diff --git a/extmod/re1.5/compilecode.c b/extmod/re1.5/compilecode.c
index 3267a4190d..a685a508a0 100644
--- a/extmod/re1.5/compilecode.c
+++ b/extmod/re1.5/compilecode.c
@@ -5,9 +5,9 @@
 #include "re1.5.h"
 
 #define INSERT_CODE(at, num, pc) \
-    ((code ? memmove(code + at + num, code + at, pc - at) : (void)0), pc += num)
+    ((code ? memmove(code + at + num, code + at, pc - at) : 0), pc += num)
 #define REL(at, to) (to - at - 2)
-#define EMIT(at, byte) (code ? (code[at] = byte) : (void)(at))
+#define EMIT(at, byte) (code ? (code[at] = byte) : (at))
 #define PC (prog->bytelen)
 
 static const char *_compilecode(const char *re, ByteProg *prog, int sizecode)