diff --git a/Compat.c b/Compat.c
index 43d02ec7..1077c08b 100644
--- a/Compat.c
+++ b/Compat.c
@@ -37,7 +37,7 @@ int Compat_faccessat(int dirfd,
 #endif
 
    // Error out on unsupported configurations
-   if (dirfd != AT_FDCWD || mode != F_OK) {
+   if (dirfd != (int)AT_FDCWD || mode != F_OK) {
       errno = EINVAL;
       return -1;
    }