diff --git a/unix/file.c b/unix/file.c
index a0a865a263..5bda34013f 100644
--- a/unix/file.c
+++ b/unix/file.c
@@ -1,3 +1,4 @@
+#include <stdio.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <errno.h>