diff --git a/servers/slurpd/ri.c b/servers/slurpd/ri.c
index 212c38bed7..ff65b2c484 100644
--- a/servers/slurpd/ri.c
+++ b/servers/slurpd/ri.c
@@ -22,6 +22,7 @@
 #include <stdio.h>
 
 #include <ac/stdlib.h>
+#include <ac/string.h>
 #include <ac/signal.h>
 
 #include "slurp.h"