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>