diff --git a/mbus/mbus-protocol.c b/mbus/mbus-protocol.c
index a032786..c0a4c37 100755
--- a/mbus/mbus-protocol.c
+++ b/mbus/mbus-protocol.c
@@ -10,7 +10,6 @@
 
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
 #include <stdio.h>
 #include <string.h>