diff --git a/src/RageFileManager_ReadAhead.cpp b/src/RageFileManager_ReadAhead.cpp
index 692b7ffc4c..5c8714de89 100644
--- a/src/RageFileManager_ReadAhead.cpp
+++ b/src/RageFileManager_ReadAhead.cpp
@@ -1,6 +1,9 @@
 #include "global.h"
 #include "RageFileManager_ReadAhead.h"
 
+#if defined(HAVE_FCNTL_H)
+#include <fcntl.h>
+#endif
 #if defined(HAVE_UNISTD_H)
 #include <unistd.h>
 #endif