diff --git a/shared/os-compatibility.c b/shared/os-compatibility.c
index f687f92f..78409d15 100644
--- a/shared/os-compatibility.c
+++ b/shared/os-compatibility.c
@@ -43,7 +43,7 @@
 int
 os_fd_set_cloexec(int fd)
 {
-	long flags;
+	int flags;
 
 	if (fd == -1)
 		return -1;