diff --git a/client/src/cmdlfcotag.h b/client/src/cmdlfcotag.h
index 9577dabdb..11f0b28ce 100644
--- a/client/src/cmdlfcotag.h
+++ b/client/src/cmdlfcotag.h
@@ -20,6 +20,7 @@
 #define CMDLFCOTAG_H__
 
 #include "common.h"
+#include <stdbool.h>
 
 #ifndef COTAG_BITS
 #define COTAG_BITS 264