diff --git a/include/system.h b/include/system.h
index 9f1ebbe69..98bdfdc27 100644
--- a/include/system.h
+++ b/include/system.h
@@ -561,7 +561,7 @@ E int abs(int);
 #ifdef atoi
 #undef atoi
 #endif
-E int atoi, (const char *);
+E int atoi(const char *);
 #endif
 
 #undef E