diff --git a/src/layers.h b/src/layers.h
index 4b0ae236..d3f3b994 100644
--- a/src/layers.h
+++ b/src/layers.h
@@ -4,6 +4,9 @@
 #include "key_defs.h"
 #include KALEIDOSCOPE_HARDWARE_H
 
+// The total number of defined layers in the firmware sketch keymaps[] array
+extern const uint8_t LayerCount;
+
 class Layer_ {
  public:
   Layer_(void);