diff --git a/thewidgetfactory/src/themes.c b/thewidgetfactory/src/themes.c

index ae667cf..7048367 100644

--- a/thewidgetfactory/src/themes.c

+++ b/thewidgetfactory/src/themes.c

@@ -10,6 +10,7 @@

 #include <sys/types.h>

 #include <sys/stat.h>

 #include <errno.h>

+#include <string.h>

 #include <glib.h>

 #include <gtk/gtk.h>