diff --git a/info-daemon/NetworkManagerInfoPassphraseDialog.c b/info-daemon/NetworkManagerInfoPassphraseDialog.c
index d8beff3e02..ab66ded72a 100644
--- a/info-daemon/NetworkManagerInfoPassphraseDialog.c
+++ b/info-daemon/NetworkManagerInfoPassphraseDialog.c
@@ -24,6 +24,7 @@
 #include <libintl.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <gtk/gtk.h>
 #include <glade/glade.h>
 #include <glib.h>