1 files changed, 1 insertions, 1 deletions
diff --git a/ruby.c b/ruby.c
index b53784feb1..2e6751f0f2 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1137,7 +1137,7 @@ uscore_get(void)
     VALUE line;
 
     line = rb_lastline_get();
-    if (TYPE(line) != T_STRING) {
+    if (!RB_TYPE_P(line, T_STRING)) {
 	rb_raise(rb_eTypeError, "$_ value need to be String (%s given)",
 		 NIL_P(line) ? "nil" : rb_obj_classname(line));
     }