diff --git a/tools/gostd/_tests/gold/amd64-linux/gosrc.gold b/tools/gostd/_tests/gold/amd64-linux/gosrc.gold
index 278ec23a3..2266e3aa5 100644
--- a/tools/gostd/_tests/gold/amd64-linux/gosrc.gold
+++ b/tools/gostd/_tests/gold/amd64-linux/gosrc.gold
@@ -152416,8 +152416,6 @@ func ExtractGoObjectSliceHeader(args []Object, index int) *reflect.SliceHeader {
 	switch o := a.(type) {
 	case GoObject:
 		switch r := o.O.(type) {
-		case reflect.SliceHeader:
-			return &r
 		case *reflect.SliceHeader:
 			return r
 		}
@@ -152435,34 +152433,12 @@ func ExtractGo_go_std_reflect__SliceHeader(rcvr, arg string, args *ArraySeq, n i
 	return
 }
 
-func _mapToSliceHeader(o Map) *reflect.SliceHeader {
-	return &reflect.SliceHeader{
-		Data: FieldAsUintPtr(o, "Data"),
-		Len: FieldAsInt(o, "Len"),
-		Cap: FieldAsInt(o, "Cap"),
-	}
-}
-
-func _Ctor_SliceHeader(_v Object) *reflect.SliceHeader {
-	switch _o := _v.(type) {
-	case *ArrayMap, *HashMap:
-		return _mapToSliceHeader(_o.(Map))
-	}
-	panic(RT.NewArgTypeError(0, _v, "GoObject[reflect.SliceHeader] or: Map"))
-}
-
-func _Wrapped_Ctor_SliceHeader(_o Object) Object {
-	return MakeGoObject(_Ctor_SliceHeader(_o))
-}
-
 GO TYPE reflect.StringHeader from reflect/value.go:
 func ExtractGoObjectStringHeader(args []Object, index int) *reflect.StringHeader {
 	a := args[index]
 	switch o := a.(type) {
 	case GoObject:
 		switch r := o.O.(type) {
-		case reflect.StringHeader:
-			return &r
 		case *reflect.StringHeader:
 			return r
 		}
@@ -152480,25 +152456,6 @@ func ExtractGo_go_std_reflect__StringHeader(rcvr, arg string, args *ArraySeq, n
 	return
 }
 
-func _mapToStringHeader(o Map) *reflect.StringHeader {
-	return &reflect.StringHeader{
-		Data: FieldAsUintPtr(o, "Data"),
-		Len: FieldAsInt(o, "Len"),
-	}
-}
-
-func _Ctor_StringHeader(_v Object) *reflect.StringHeader {
-	switch _o := _v.(type) {
-	case *ArrayMap, *HashMap:
-		return _mapToStringHeader(_o.(Map))
-	}
-	panic(RT.NewArgTypeError(0, _v, "GoObject[reflect.StringHeader] or: Map"))
-}
-
-func _Wrapped_Ctor_StringHeader(_o Object) Object {
-	return MakeGoObject(_Ctor_StringHeader(_o))
-}
-
 GO TYPE reflect.StructField from reflect/type.go:
 func ExtractGoObjectStructField(args []Object, index int) *reflect.StructField {
 	a := args[index]
@@ -153705,7 +153662,6 @@ GO INFO FOR TYPE go.std.reflect/refToSelectDir from /usr/local/go/src/reflect/va
 GO INFO FOR TYPE go.std.reflect/SliceHeader from /usr/local/go/src/reflect/value.go:1994:6:
 	info_SliceHeader = GoTypeInfo{Name: "go.std.reflect/SliceHeader",
 		GoType: &GoType{T: &info_SliceHeader},
-		Ctor: _Wrapped_Ctor_SliceHeader,
 		Members: GoMembers{
 		},
 	}
@@ -153714,7 +153670,6 @@ GO INFO FOR TYPE go.std.reflect/SliceHeader from /usr/local/go/src/reflect/value
 GO INFO FOR TYPE go.std.reflect/refToSliceHeader from /usr/local/go/src/reflect/value.go:1994:6:
 	info_PtrTo_SliceHeader = GoTypeInfo{Name: "go.std.reflect/refToSliceHeader",
 		GoType: &GoType{T: &info_PtrTo_SliceHeader},
-		Ctor: _Wrapped_Ctor_SliceHeader,
 		Members: GoMembers{
 		},
 	}
@@ -153723,7 +153678,6 @@ GO INFO FOR TYPE go.std.reflect/refToSliceHeader from /usr/local/go/src/reflect/
 GO INFO FOR TYPE go.std.reflect/StringHeader from /usr/local/go/src/reflect/value.go:1983:6:
 	info_StringHeader = GoTypeInfo{Name: "go.std.reflect/StringHeader",
 		GoType: &GoType{T: &info_StringHeader},
-		Ctor: _Wrapped_Ctor_StringHeader,
 		Members: GoMembers{
 		},
 	}
@@ -153732,7 +153686,6 @@ GO INFO FOR TYPE go.std.reflect/StringHeader from /usr/local/go/src/reflect/valu
 GO INFO FOR TYPE go.std.reflect/refToStringHeader from /usr/local/go/src/reflect/value.go:1983:6:
 	info_PtrTo_StringHeader = GoTypeInfo{Name: "go.std.reflect/refToStringHeader",
 		GoType: &GoType{T: &info_PtrTo_StringHeader},
-		Ctor: _Wrapped_Ctor_StringHeader,
 		Members: GoMembers{
 		},
 	}
@@ -176520,6 +176473,6 @@ Totals: functions=4055 generated=2987 (73.66%)
           receivers=2063 (50.88%) generated=1459 (70.72%)
           methods=397 (9.79%) generated=247 (62.22%)
         types=1841
-          constructable=1674 ctors=887 (52.99%)
+          constructable=1674 ctors=883 (52.75%)
         constants=4394 generated=4356 (99.14%)
         variables=439 generated=439 (100.00%)
diff --git a/tools/gostd/codegen.go b/tools/gostd/codegen.go
index 75541230b..52325ea18 100644
--- a/tools/gostd/codegen.go
+++ b/tools/gostd/codegen.go
@@ -443,21 +443,27 @@ func ExtractGoObject%s(args []Object, index int) *%s {
 	switch o := a.(type) {
 	case GoObject:
 		switch r := o.O.(type) {
-		case %s:
-			return &r
-		case *%s:
+%s		case *%s:
 			return r
 		}
 	%s}
 	panic(RT.NewArgTypeError(index, a, "GoObject[%s]"))
 }
+`
+	const goExtractRefToTemplate = `
+		case %s:
+			return &r
 `
 
 	baseTypeName := ts.Name.Name
 	typeName := myGoImport + "." + baseTypeName
 
 	others := maybeImplicitConvert(godb.GoFileForTypeSpec(ts), typeName, ts)
-	goc := fmt.Sprintf(goExtractTemplate, baseTypeName, typeName, typeName, typeName, others, t)
+	goExtractRefTo := ""
+	if !(ti.GoPackage() == "reflect" && (ti.GoBaseName() == "StringHeader" || ti.GoBaseName() == "SliceHeader")) {
+		goExtractRefTo = fmt.Sprintf(goExtractRefToTemplate[1:], typeName)
+	}
+	goc := fmt.Sprintf(goExtractTemplate, baseTypeName, typeName, goExtractRefTo, typeName, others, t)
 
 	goc += goTypeExtractor(t, ti)
 
@@ -474,6 +480,9 @@ func genCtor(tyi TypeInfo) {
 	if !tyi.Custom() {
 		return
 	}
+	if tyi.GoPackage() == "reflect" && (tyi.GoBaseName() == "StringHeader" || tyi.GoBaseName() == "SliceHeader") {
+		return
+	}
 
 	ts := tyi.TypeSpec()
 	if ts == nil {