diff --git a/cl/_testc/inline/in.cfg b/cl/_testc/inline/in.cfg
index 06657c0b..86a2677a 100644
--- a/cl/_testc/inline/in.cfg
+++ b/cl/_testc/inline/in.cfg
@@ -1,4 +1,5 @@
 {
     "LLGoPackage": "link: -L/path/foo -lfoo",
-    "CFlags": "-I/path/foo/include"
+    "CFlags": "-I/path/foo/include",
+    "WrapFileHeader": "#include <foo.h>\n"
 }
diff --git a/cl/_testc/inline/wrap.c b/cl/_testc/inline/wrap.c
index 8d0c030e..3ceaead3 100644
--- a/cl/_testc/inline/wrap.c
+++ b/cl/_testc/inline/wrap.c
@@ -1,5 +1,9 @@
+#include <foo.h>
+
 int _llcppg_add(int a, int b) {
+	return add(a, b);
 }
 
 int _llcppg_mul(int a, int b) {
+	return mul(a, b);
 }
diff --git a/cl/_testcpp/inline/in.cfg b/cl/_testcpp/inline/in.cfg
index 06657c0b..86a2677a 100644
--- a/cl/_testcpp/inline/in.cfg
+++ b/cl/_testcpp/inline/in.cfg
@@ -1,4 +1,5 @@
 {
     "LLGoPackage": "link: -L/path/foo -lfoo",
-    "CFlags": "-I/path/foo/include"
+    "CFlags": "-I/path/foo/include",
+    "WrapFileHeader": "#include <foo.h>\n"
 }
diff --git a/cl/_testcpp/inline/wrap.cpp b/cl/_testcpp/inline/wrap.cpp
index eb67aeff..da679932 100644
--- a/cl/_testcpp/inline/wrap.cpp
+++ b/cl/_testcpp/inline/wrap.cpp
@@ -1,5 +1,9 @@
-unsigned int _llcppg__ZN3bar1fEi(int a) {
+#include <foo.h>
+
+unsigned int _llcppg__ZN3bar1fEi(bar* this, int a) {
+	return this->f(a);
 }
 
-void _llcppg__ZN3bar2_gEv() {
+void _llcppg__ZN3bar2_gEv(bar* this) {
+	this->_g();
 }
diff --git a/cl/class.go b/cl/class.go
index ed70c819..cd59409a 100644
--- a/cl/class.go
+++ b/cl/class.go
@@ -35,6 +35,8 @@ type classMethod struct {
 
 type classCtx struct {
 	scopeCtx
+	decl          clang.Cursor
+	typNamed      *types.Named
 	fields        []*types.Var
 	publicMethods []*classMethod
 	inPublic      bool
@@ -55,12 +57,13 @@ func compileClass(ctx *pkgCtx, scope *classCtx, cls clang.Cursor) {
 		substObj(pkgTypes, pkgTypes.Scope(), origName, typNamed.Obj())
 	}
 	scope.reorder()
+	scope.typNamed = typNamed
 	for _, method := range scope.publicMethods {
 		obj := method.obj
 		if decl := method.outsideDecl; decl.Kind != 0 {
-			compileFuncOrMethod(ctx, decl, obj, typNamed)
+			compileFuncOrMethod(ctx, decl, obj, scope)
 		} else {
-			compileFuncOrMethod(ctx, obj.decl, obj, typNamed)
+			compileFuncOrMethod(ctx, obj.decl, obj, scope)
 		}
 	}
 }
@@ -69,6 +72,7 @@ func loadClass(ctx *pkgCtx, cls clang.Cursor, defaultInPublic bool) {
 	pkg := ctx.pkg
 	pkgTypes := pkg.Types
 	scope := &classCtx{
+		decl:      cls,
 		overloads: make(map[string]*overloads),
 		inPublic:  defaultInPublic,
 	}
diff --git a/cl/cltest/cltest.go b/cl/cltest/cltest.go
index 9acae296..cafcd87f 100644
--- a/cl/cltest/cltest.go
+++ b/cl/cltest/cltest.go
@@ -30,8 +30,9 @@ import (
 
 // Config represents the lltest configuration.
 type Config struct {
-	LLGoPackage string `json:"LLGoPackage"`
-	CFlags      string `json:"CFlags"`
+	LLGoPackage    string `json:"LLGoPackage"`
+	WrapFileHeader string `json:"WrapFileHeader"`
+	CFlags         string `json:"CFlags"`
 }
 
 // LoadConf loads the lltest configuration.
diff --git a/cl/compile.go b/cl/compile.go
index ad7fe05d..c3ca0409 100644
--- a/cl/compile.go
+++ b/cl/compile.go
@@ -82,6 +82,10 @@ type Config struct {
 	// If not specified, llcppg will skip wrapping inline functions/methods.
 	CFlags string
 
+	// WrapFileHeader specifies the header content to be included at the top of the generated
+	// wrapper file (optional).
+	WrapFileHeader string
+
 	// NameLookup looks up the archive path for a given mangling name. It returns the
 	// archive path and a boolean indicating whether the lookup was successful. If not
 	// specified, llcppg uses a default lookup function that returns an empty archivePath
@@ -136,8 +140,8 @@ func NewPackage(pkgPath, pkgName string, conf *Config, tu clang.TranslationUnit,
 	}
 	ctx := &pkgCtx{
 		pkg: pkg, cb: pkg.CB(), llgo: llgo, fset: pkg.Fset, tu: tu, c: c,
-		lang: conf.Language, cflags: conf.CFlags, nameLookup: nameLookup,
-		methods: make(map[string]*classMethod),
+		lang: conf.Language, cflags: conf.CFlags, wrapFileHeader: conf.WrapFileHeader,
+		nameLookup: nameLookup, methods: make(map[string]*classMethod),
 	}
 	ctx.initFiles(files)
 	loadFiles(ctx)
diff --git a/cl/compile_test.go b/cl/compile_test.go
index 1f1c2d99..61517198 100644
--- a/cl/compile_test.go
+++ b/cl/compile_test.go
@@ -67,11 +67,12 @@ func testFromDir(t *testing.T, sel, relDir string, lang cl.Language) {
 		conf, _ := cltest.LoadConf(pkgDir + "/in.cfg")
 		imp := packages.NewImporter(nil)
 		pkg, err := cl.NewPackage("", "foo", &cl.Config{
-			Importer:    imp,
-			LLGoPackage: conf.LLGoPackage,
-			Language:    lang,
-			CFlags:      conf.CFlags,
-			NameLookup:  nil,
+			Importer:       imp,
+			LLGoPackage:    conf.LLGoPackage,
+			Language:       lang,
+			WrapFileHeader: conf.WrapFileHeader,
+			CFlags:         conf.CFlags,
+			NameLookup:     nil,
 		}, u, filename)
 		if err != nil {
 			t.Error("cl.NewPackage:", err)
diff --git a/cl/ctx.go b/cl/ctx.go
index 3779879b..a3c9e140 100644
--- a/cl/ctx.go
+++ b/cl/ctx.go
@@ -98,6 +98,8 @@ type pkgCtx struct {
 	cflags string
 	lang   Language
 
+	wrapFileHeader string
+
 	nameLookup func(manglingName string) (archivePath string, ok bool)
 
 	fileBases map[clang.File]int // clang.File => base
diff --git a/cl/func.go b/cl/func.go
index 50a24add..e749d690 100644
--- a/cl/func.go
+++ b/cl/func.go
@@ -37,7 +37,7 @@ func loadGlobalFunc(ctx *pkgCtx, scope *scopeCtx, decl clang.Cursor) {
 	})
 }
 
-func compileFuncOrMethod(ctx *pkgCtx, fn clang.Cursor, obj *object, typNamed *types.Named) {
+func compileFuncOrMethod(ctx *pkgCtx, fn clang.Cursor, obj *object, cls *classCtx) {
 	manglingName := clang.Mangling(fn)
 	origName := obj.name
 	if fn.IsFunctionInlined() != 0 {
@@ -47,7 +47,7 @@ func compileFuncOrMethod(ctx *pkgCtx, fn clang.Cursor, obj *object, typNamed *ty
 			}
 			return
 		}
-		manglingName = wrapInlineFunc(ctx, manglingName, fn)
+		manglingName = wrapInlineFunc(ctx, manglingName, fn, cls)
 	} else if _, ok := ctx.nameLookup(manglingName); !ok {
 		if debugCompileDecl {
 			log.Println("func", origName, "- skipped")
@@ -65,9 +65,10 @@ func compileFuncOrMethod(ctx *pkgCtx, fn clang.Cursor, obj *object, typNamed *ty
 	var recv *types.Var
 	var nameInPkg string
 	var fnName, rewritten = ctx.getPubName(origName, obj.order())
-	if typNamed == nil {
+	if cls == nil {
 		nameInPkg = fnName
 	} else {
+		typNamed := cls.typNamed
 		nameInPkg = "(*" + typNamed.Obj().Name() + ")." + fnName
 		recv = types.NewParam(token.NoPos, pkgTypes, "this", types.NewPointer(typNamed))
 	}
@@ -80,7 +81,7 @@ func compileFuncOrMethod(ctx *pkgCtx, fn clang.Cursor, obj *object, typNamed *ty
 		log.Panicln("compileFunc:", origName, err)
 	}
 
-	if typNamed == nil {
+	if cls == nil {
 		ctx.forceImportUnsafe()
 		f.SetComments(pkg, &ast.CommentGroup{
 			List: []*ast.Comment{
diff --git a/cl/wrap.go b/cl/wrap.go
index 8685a6be..d8aa60cd 100644
--- a/cl/wrap.go
+++ b/cl/wrap.go
@@ -49,17 +49,18 @@ func newWrapFile(ctx *pkgCtx) *WrapFile {
 	return &WrapFile{Filename: filename}
 }
 
-func wrapInlineFunc(ctx *pkgCtx, manglingName string, fn clang.Cursor) string {
+func wrapInlineFunc(ctx *pkgCtx, manglingName string, fn clang.Cursor, cls *classCtx) string {
 	first := ctx.wrap == nil
 	if first {
 		ctx.wrap = newWrapFile(ctx)
 	}
 	w := &ctx.wrap.Content
-	if !first {
-		w.WriteByte('\n')
+	if first {
+		w.WriteString(ctx.wrapFileHeader)
 	}
+	w.WriteByte('\n')
 	wrapName := "_llcppg_" + manglingName
-	writeFunc(w, wrapName, fn)
+	writeFunc(w, wrapName, fn, cls)
 	return wrapName
 }
 
@@ -67,27 +68,48 @@ func wrapInlineFunc(ctx *pkgCtx, manglingName string, fn clang.Cursor) string {
 
 type writerT = bytes.Buffer
 
-func writeFunc(b *writerT, name string, fn clang.Cursor) {
-	writeFuncProto(b, name, fn)
-	b.WriteString(` {
-}
-`)
+func writeFunc(b *writerT, name string, fn clang.Cursor, cls *classCtx) {
+	var call writerT
+	writeFuncProto(b, &call, name, fn, cls)
+	b.WriteString(" {\n")
+	b.Write(call.Bytes())
+	b.WriteString("}\n")
 }
 
-func writeFuncProto(out *writerT, name string, fn clang.Cursor) {
+func writeFuncProto(out, call *writerT, name string, fn clang.Cursor, cls *classCtx) {
 	var b writerT
 	b.WriteString(name)
 	b.WriteByte('(')
+	call.WriteByte('\t')
+	retType := fn.ResultType()
+	if retType.Kind != lc.TypeVoid {
+		call.WriteString("return ")
+	}
+	notFirst := cls != nil
+	if notFirst {
+		b.WriteString(clang.String(cls.decl.Type()))
+		b.WriteString("* this")
+		call.WriteString("this->")
+	}
+	call.WriteString(clang.String(fn))
+	call.WriteByte('(')
 	for i := range c.Uint(fn.NumArguments()) {
 		if i > 0 {
+			call.WriteString(", ")
+		}
+		if notFirst {
 			b.WriteString(", ")
+		} else {
+			notFirst = true
 		}
 		arg := fn.Argument(i)
 		argName := clang.String(arg)
 		writeParam(&b, arg.Type(), argName)
+		call.WriteString(argName)
 	}
 	b.WriteByte(')')
-	writeParam(out, fn.ResultType(), b.String())
+	call.WriteString(");\n")
+	writeParam(out, retType, b.String())
 }
 
 func writeParam(b *writerT, typ lc.Type, name string) {