1 files changed, 2 insertions, 3 deletions
diff --git a/ext/fiddle/function.c b/ext/fiddle/function.c
index e0da8b69cb..50a2d24232 100644
--- a/ext/fiddle/function.c
+++ b/ext/fiddle/function.c
@@ -144,9 +144,8 @@ function_call(int argc, VALUE argv[], VALUE self)
     cPointer = rb_const_get(mFiddle, rb_intern("Pointer"));
 
     Check_Max_Args("number of arguments", argc);
-    if(argc != RARRAY_LENINT(types)) {
-	rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)",
-		argc, RARRAY_LENINT(types));
+    if (argc != (i = RARRAY_LENINT(types))) {
+	rb_error_arity(argc, i, i);
     }
 
     TypedData_Get_Struct(self, ffi_cif, &function_data_type, cif);