diff --git a/libtransmission/verify.c b/libtransmission/verify.c
index c966eb898..f77ce5777 100644
--- a/libtransmission/verify.c
+++ b/libtransmission/verify.c
@@ -15,7 +15,9 @@
 
 #ifdef HAVE_POSIX_FADVISE
  #define _XOPEN_SOURCE 600
- #include <fcntl.h> /* posix_fadvise() */
+#endif
+#if defined(HAVE_POSIX_FADVISE) || defined(SYS_DARWIN)
+ #include <fcntl.h> /* posix_fadvise() / fcntl() */
 #endif
 
 #include <openssl/sha.h>