diff --git a/compiler/llvm.go b/compiler/llvm.go
index 9b5d40fc..81bd0b1f 100644
--- a/compiler/llvm.go
+++ b/compiler/llvm.go
@@ -147,7 +147,7 @@ func (c *compilerContext) createObjectLayout(t llvm.Type, pos token.Pos) llvm.Va
 
 	// Create the global initializer.
 	bitmapBytes := make([]byte, int(objectSizeWords+7)/8)
-	copy(bitmapBytes, bitmap.Bytes())
+	bitmap.FillBytes(bitmapBytes)
 	var bitmapByteValues []llvm.Value
 	for _, b := range bitmapBytes {
 		bitmapByteValues = append(bitmapByteValues, llvm.ConstInt(c.ctx.Int8Type(), uint64(b), false))
diff --git a/compiler/testdata/gc.go b/compiler/testdata/gc.go
index 74e0358a..ecff9f88 100644
--- a/compiler/testdata/gc.go
+++ b/compiler/testdata/gc.go
@@ -20,6 +20,10 @@ var (
 		y [60]uintptr
 		z *byte
 	}
+	struct4 *struct {
+		x *byte
+		y [61]uintptr
+	}
 
 	slice1 []byte
 	slice2 []*int
@@ -50,6 +54,10 @@ func newStruct() {
 		y [60]uintptr
 		z *byte
 	})
+	struct4 = new(struct {
+		x *byte
+		y [61]uintptr
+	})
 }
 
 func newFuncValue() *func() {
diff --git a/compiler/testdata/gc.ll b/compiler/testdata/gc.ll
index 375763f3..ec66e7c7 100644
--- a/compiler/testdata/gc.ll
+++ b/compiler/testdata/gc.ll
@@ -17,10 +17,12 @@ target triple = "wasm32-unknown-wasi"
 @main.struct1 = hidden global {}* null, align 4
 @main.struct2 = hidden global { i32, i32 }* null, align 4
 @main.struct3 = hidden global { i8*, [60 x i32], i8* }* null, align 4
+@main.struct4 = hidden global { i8*, [61 x i32] }* null, align 4
 @main.slice1 = hidden global { i8*, i32, i32 } zeroinitializer, align 8
 @main.slice2 = hidden global { i32**, i32, i32 } zeroinitializer, align 8
 @main.slice3 = hidden global { { i8*, i32, i32 }*, i32, i32 } zeroinitializer, align 8
 @"runtime/gc.layout:62-2000000000000001" = linkonce_odr unnamed_addr constant { i32, [8 x i8] } { i32 62, [8 x i8] c" \00\00\00\00\00\00\01" }
+@"runtime/gc.layout:62-0001" = linkonce_odr unnamed_addr constant { i32, [8 x i8] } { i32 62, [8 x i8] c"\00\00\00\00\00\00\00\01" }
 @"reflect/types.type:basic:complex128" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* null, i32 0, %runtime.interfaceMethodInfo* null, %runtime.typecodeID* @"reflect/types.type:pointer:basic:complex128", i32 0 }
 @"reflect/types.type:pointer:basic:complex128" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* @"reflect/types.type:basic:complex128", i32 0, %runtime.interfaceMethodInfo* null, %runtime.typecodeID* null, i32 0 }
 
@@ -67,6 +69,8 @@ entry:
   store i8* %new1, i8** bitcast ({ i32, i32 }** @main.struct2 to i8**), align 4
   %new2 = call i8* @runtime.alloc(i32 248, i8* bitcast ({ i32, [8 x i8] }* @"runtime/gc.layout:62-2000000000000001" to i8*), i8* undef, i8* null) #0
   store i8* %new2, i8** bitcast ({ i8*, [60 x i32], i8* }** @main.struct3 to i8**), align 4
+  %new3 = call i8* @runtime.alloc(i32 248, i8* bitcast ({ i32, [8 x i8] }* @"runtime/gc.layout:62-0001" to i8*), i8* undef, i8* null) #0
+  store i8* %new3, i8** bitcast ({ i8*, [61 x i32] }** @main.struct4 to i8**), align 4
   ret void
 }