diff --git a/internal/runtime/z_face.go b/internal/runtime/z_face.go
index 333738d7..6b007402 100644
--- a/internal/runtime/z_face.go
+++ b/internal/runtime/z_face.go
@@ -487,7 +487,7 @@ func interfaceStr(ft *abi.InterfaceType) string {
 	repr = append(repr, "interface {"...)
 	for i, t := range ft.Methods {
 		if i > 0 {
-			repr = append(repr, "; "...)
+			repr = append(repr, ';')
 		}
 		repr = append(repr, ' ')
 		repr = append(repr, t.Name_...)
diff --git a/internal/runtime/z_type.go b/internal/runtime/z_type.go
index f46fbe29..24fc4222 100644
--- a/internal/runtime/z_type.go
+++ b/internal/runtime/z_type.go
@@ -153,7 +153,7 @@ func Struct(pkgPath string, size uintptr, fields ...abi.StructField) *Type {
 			Size_: size,
 			Hash:  uint32(abi.Struct), // TODO(xsw): hash
 			Kind_: uint8(abi.Struct),
-			Str_:  "struct {...}",
+			Str_:  structStr(fields),
 		},
 		PkgPath_: pkgPath,
 		Fields:   fields,
@@ -401,6 +401,27 @@ func ispaddedfield(st *structtype, i int) bool {
 	return fd.Offset+fd.Typ.Size_ != end
 }
 
+func structStr(fields []abi.StructField) string {
+	repr := make([]byte, 0, 64)
+	repr = append(repr, "struct {"...)
+	for i, st := range fields {
+		if i > 0 {
+			repr = append(repr, ';')
+		}
+		repr = append(repr, ' ')
+		if !st.Embedded_ {
+			repr = append(repr, st.Name_...)
+			repr = append(repr, ' ')
+		}
+		repr = append(repr, st.Typ.String()...)
+	}
+	if len(fields) > 0 {
+		repr = append(repr, ' ')
+	}
+	repr = append(repr, '}')
+	return string(repr)
+}
+
 type rtypes struct {
 	types []*abi.Type
 }