diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index edf4e46652..cd71c7ae43 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -927,11 +927,11 @@ check_match(VALUE pattern, VALUE target, enum vm_check_match_type type)
 	VALUE defined_class;
 	rb_method_entry_t *me = rb_method_entry_with_refinements(CLASS_OF(pattern), idEqq, &defined_class);
 	if (me) {
-	  return vm_call0(GET_THREAD(), pattern, idEqq, 1, &target, me, defined_class);
+	    return vm_call0(GET_THREAD(), pattern, idEqq, 1, &target, me, defined_class);
 	}
 	else {
-	  /* fallback to funcall (e.g. method_missing) */
-	  return rb_funcall2(pattern, idEqq, 1, &target);
+	    /* fallback to funcall (e.g. method_missing) */
+	    return rb_funcall2(pattern, idEqq, 1, &target);
 	}
       }
       default: