diff --git a/ede-panel/Panel.cpp b/ede-panel/Panel.cpp
index bd0273f..f7ef0d9 100644
--- a/ede-panel/Panel.cpp
+++ b/ede-panel/Panel.cpp
@@ -19,6 +19,7 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <limits.h>
 #include <FL/Fl.H>