1 files changed, 1 insertions, 0 deletions

diff --git a/uid_db.c b/uid_db.c
index 7336a00e..61da7322 100644
--- a/uid_db.c
+++ b/uid_db.c
@@ -12,6 +12,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>  // ffs() lives here
 
 #include "xmalloc.h"
 #include "uid_db.h"