diff --git a/client/src/cmdlfem4x70.h b/client/src/cmdlfem4x70.h
index 75e3e27fc..f0f221b06 100644
--- a/client/src/cmdlfem4x70.h
+++ b/client/src/cmdlfem4x70.h
@@ -12,6 +12,7 @@
 #define CMDLFEM4X70_H__
 
 #include "common.h"
+#include "em4x50.h"
 
 #define TIMEOUT                     2000