diff --git a/go/ssa/interp/external.go b/go/ssa/interp/external.go
index 0ce20478cc..9289696a1e 100644
--- a/go/ssa/interp/external.go
+++ b/go/ssa/interp/external.go
@@ -94,9 +94,9 @@ func init() {
 		"runtime.NumCPU":                   ext۰runtime۰NumCPU,
 		"runtime.ReadMemStats":             ext۰runtime۰ReadMemStats,
 		"runtime.SetFinalizer":             ext۰runtime۰SetFinalizer,
-		"runtime.funcentry_go":             ext۰runtime۰funcentry_go,
-		"runtime.funcline_go":              ext۰runtime۰funcline_go,
-		"runtime.funcname_go":              ext۰runtime۰funcname_go,
+		"(*runtime.Func).Entry":            ext۰runtime۰Func۰Entry,
+		"(*runtime.Func).FileLine":         ext۰runtime۰Func۰FileLine,
+		"(*runtime.Func).Name":             ext۰runtime۰Func۰Name,
 		"runtime.getgoroot":                ext۰runtime۰getgoroot,
 		"strings.IndexByte":                ext۰strings۰IndexByte,
 		"sync.runtime_Semacquire":          ext۰sync۰runtime_Semacquire,
@@ -402,8 +402,10 @@ func ext۰runtime۰SetFinalizer(fr *frame, args []value) value {
 	return nil // ignore
 }
 
-func ext۰runtime۰funcline_go(fr *frame, args []value) value {
-	// func funcline_go(*Func, uintptr) (string, int)
+// Pretend: type runtime.Func struct { entry *ssa.Function }
+
+func ext۰runtime۰Func۰FileLine(fr *frame, args []value) value {
+	// func (*runtime.Func) FileLine(uintptr) (string, int)
 	f, _ := (*args[0].(*value)).(structure)[0].(*ssa.Function)
 	pc := args[1].(uintptr)
 	_ = pc
@@ -415,8 +417,8 @@ func ext۰runtime۰funcline_go(fr *frame, args []value) value {
 	return tuple{"", 0}
 }
 
-func ext۰runtime۰funcname_go(fr *frame, args []value) value {
-	// func funcname_go(*Func) string
+func ext۰runtime۰Func۰Name(fr *frame, args []value) value {
+	// func (*runtime.Func) Name() string
 	f, _ := (*args[0].(*value)).(structure)[0].(*ssa.Function)
 	if f != nil {
 		return f.String()
@@ -424,8 +426,8 @@ func ext۰runtime۰funcname_go(fr *frame, args []value) value {
 	return ""
 }
 
-func ext۰runtime۰funcentry_go(fr *frame, args []value) value {
-	// func funcentry_go(*Func) uintptr
+func ext۰runtime۰Func۰Entry(fr *frame, args []value) value {
+	// func (*runtime.Func) Entry() uintptr
 	f, _ := (*args[0].(*value)).(structure)[0].(*ssa.Function)
 	return uintptr(unsafe.Pointer(f))
 }