diff --git a/py/compile.c b/py/compile.c
index 9be90a6..6a87236 100644
--- a/py/compile.c
+++ b/py/compile.c
@@ -2509,7 +2509,7 @@
     NULL,
 #define nc NULL
 #define c(f) compile_##f
-#define DEF_RULE(rule, comp, kind, arg...) comp,
+#define DEF_RULE(rule, comp, kind, ...) comp,
 #include "grammar.h"
 #undef nc
 #undef c