1 files changed, 5 insertions, 0 deletions
diff --git a/util.c b/util.c
index ad2a1b8..5759d8c 100644
--- a/util.c
+++ b/util.c
@@ -28,9 +28,14 @@
 
 #include <sys/types.h>
 #include <sys/stat.h>
+
 #ifdef USE_MMAP
 #include <sys/mman.h>
+#ifndef MAP_FAILED
+#define MAP_FAILED ((void *) -1)
+#endif /* !MAP_FAILED */
 #endif /* USE MMAP */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>