diff --git a/src/inotify-map.c b/src/inotify-map.c
index df0b74a..0b4d738 100644
--- a/src/inotify-map.c
+++ b/src/inotify-map.c
@@ -8,6 +8,7 @@
  *  (at your option) any later version.
  */
 
+#include <string.h>
 #include "xalloc.h"
 #include "rbtree.h"
 #include "inotify-map.h"