diff --git a/src/devices/file.c b/src/devices/file.c
index a208b8f..bc7c4fd 100644
--- a/src/devices/file.c
+++ b/src/devices/file.c
@@ -26,6 +26,10 @@
 #define PATH_MAX 4096
 #endif
 
+#ifdef __APPLE__
+int snprintf(char *, unsigned long, const char *, ...);
+#endif
+
 #include "../uxn.h"
 #include "file.h"