diff --git a/c/ios.c b/c/ios.c
index 7f066a1..a78db9e 100644
--- a/c/ios.c
+++ b/c/ios.c
@@ -16,7 +16,6 @@
 #include <malloc.h>
 #include <io.h>
 #include <fcntl.h>
-#define fileno _fileno
 #else
 #include <unistd.h>
 #include <sys/time.h>