diff --git a/string.c b/string.c
index dc1df0671d..1a9fd3bca1 100644
--- a/string.c
+++ b/string.c
@@ -5032,8 +5032,7 @@ get_pat_quoted(VALUE pat, int check)
 {
     VALUE val;
 
-    if (SPECIAL_CONST_P(pat)) goto to_string;
-    switch (BUILTIN_TYPE(pat)) {
+    switch (OBJ_BUILTIN_TYPE(pat)) {
       case T_REGEXP:
 	return pat;
 
@@ -5041,7 +5040,6 @@ get_pat_quoted(VALUE pat, int check)
 	break;
 
       default:
-      to_string:
 	val = rb_check_string_type(pat);
 	if (NIL_P(val)) {
 	    Check_Type(pat, T_REGEXP);