diff --git a/usr.sbin/apmd/apmdparse.y b/usr.sbin/apmd/apmdparse.y
index f0acea32b508..7ae7f49e81f8 100644
--- a/usr.sbin/apmd/apmdparse.y
+++ b/usr.sbin/apmd/apmdparse.y
@@ -33,6 +33,7 @@
 #include <stdio.h>
 #include <bitstring.h>
 #include <stdlib.h>
+#include <string.h>
 #include "apmd.h"
 
 #ifdef DEBUG