diff --git a/panel-plugin/utils.c b/panel-plugin/utils.c
index 7336034..0f36ae6 100644
--- a/panel-plugin/utils.c
+++ b/panel-plugin/utils.c
@@ -34,6 +34,7 @@
 #define BUFSIZ 512
 #endif
 
+#include "utils.h"
 /* ---------------------------------------------------------------------------------------------- */
 unsigned long min_array( unsigned long array[], int size )
 {