diff --git a/comms.h b/comms.h
index fd7822c..15b6ee3 100644
--- a/comms.h
+++ b/comms.h
@@ -11,6 +11,8 @@
 #define boostvvtPage 8
 #define seqFuelPage  9
 
+#define packetSize   37
+
 byte currentPage = 1;//Not the same as the speeduino config page numbers
 boolean isMap = true;
 unsigned long requestCount = 0; //The number of times the A command has been issued
diff --git a/globals.h b/globals.h
index 6a74db9..6da7616 100644
--- a/globals.h
+++ b/globals.h
@@ -16,7 +16,6 @@ const char TSfirmwareVersion[] = "Speeduino 2016.09";
 const byte data_structure_version = 2; //This identifies the data structure when reading / writing. 
 const byte page_size = 64;
 const int map_page_size = 288;
-const byte packetSize = 35;
 
 //Handy bitsetting macros
 #define BIT_SET(a,b) ((a) |= (1<<(b)))