diff --git a/libgo/runtime/go-caller.c b/libgo/runtime/go-caller.c
index ed6fd107b0e1..d6901e07377c 100644
--- a/libgo/runtime/go-caller.c
+++ b/libgo/runtime/go-caller.c
@@ -231,6 +231,8 @@ String runtime_funcname_go (Func *f)
 String
 runtime_funcname_go (Func *f)
 {
+  if (f == NULL)
+    return runtime_gostringnocopy ((const byte *) "");
   return f->name;
 }