diff --git a/generate_layout.rb b/generate_layout.rb
index 8181d1a..8729234 100755
--- a/generate_layout.rb
+++ b/generate_layout.rb
@@ -231,6 +231,7 @@ HEADER
 
     File.open(LayoutFile, "w+") do |f|
       f.puts header
+      f.puts "#define KB_LAYERS #{Key::Layers.size}"
       f.puts "static const uint8_t       PROGMEM _kb_layout[KB_LAYERS][KB_ROWS][KB_COLUMNS]         = { #{keys}  };"
       f.puts "static const void_funptr_t PROGMEM _kb_layout_press[KB_LAYERS][KB_ROWS][KB_COLUMNS]   = { #{downs} };"
       f.puts "static const void_funptr_t PROGMEM _kb_layout_release[KB_LAYERS][KB_ROWS][KB_COLUMNS] = { #{ups}   };"
diff --git a/src/keyboard/keyboard.h b/src/keyboard/keyboard.h
index 8bb9777..bff1e5e 100644
--- a/src/keyboard/keyboard.h
+++ b/src/keyboard/keyboard.h
@@ -25,7 +25,6 @@
 
 #define KB_ROWS   	6  // must match real life
 #define KB_COLUMNS	14  // must match real life
-#define KB_LAYERS 	10
 
 //      Name                        ID    // PC Mac Unix  Boot Keyboard Req.
 //      --------------------------- ----     -- --- ----  ---------------------
diff --git a/src/keyboard/layout.c b/src/keyboard/layout.c
index 64ac634..c16c3e9 100644
--- a/src/keyboard/layout.c
+++ b/src/keyboard/layout.c
@@ -2,6 +2,7 @@
 // ergoDOX layout : saneo (generated)
 // ----------------------------------------------------------------------------
 
+#define KB_LAYERS 4
 static const uint8_t       PROGMEM _kb_layout[KB_LAYERS][KB_ROWS][KB_COLUMNS]         = { KB_MATRIX_LAYER(
 (uint8_t) KEY_NULL,
 (uint8_t) KEY_0_RightParenthesis,
diff --git a/src/main.c b/src/main.c
index ec77286..5f396d7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -21,16 +21,25 @@ typedef enum StickyState {
   StickyNone,
   StickyOnceDown,
   StickyOnceUp,
-  StickyLock
+  StickyLock,
 } StickyState;
 
-// layer data
 #include "./main.h"
 
+// ----------------------------------------------------------------------------
+// layout data
+// ----------------------------------------------------------------------------
+
+#include "./keyboard/layout.c"
+// defines:
+// #define KB_Layers #{Layers.size}
+// static const uint8_t      	PROGMEM _kb_layout[KB_LAYERS][KB_ROWS][KB_COLUMNS];
+// static const void_funptr_t	PROGMEM _kb_layout_press[KB_LAYERS][KB_ROWS][KB_COLUMNS];
+// static const void_funptr_t	PROGMEM _kb_layout_release[KB_LAYERS][KB_ROWS][KB_COLUMNS];
+
 // ----------------------------------------------------------------------------
 // globals
 // ----------------------------------------------------------------------------
-
 static bool	_kb_is_pressed[KB_ROWS][KB_COLUMNS];
 static bool	(*kb_is_pressed)[KB_ROWS][KB_COLUMNS] = &_kb_is_pressed;
 
@@ -40,10 +49,6 @@ static bool	(*kb_was_pressed)[KB_ROWS][KB_COLUMNS] = &_kb_was_pressed;
 static bool   	kb_was_transparent[KB_ROWS][KB_COLUMNS];
 static uint8_t	layers_pressed[KB_ROWS][KB_COLUMNS];
 
-static const uint8_t      	PROGMEM _kb_layout[KB_LAYERS][KB_ROWS][KB_COLUMNS];
-static const void_funptr_t	PROGMEM _kb_layout_press[KB_LAYERS][KB_ROWS][KB_COLUMNS];
-static const void_funptr_t	PROGMEM _kb_layout_release[KB_LAYERS][KB_ROWS][KB_COLUMNS];
-
 static uint8_t	current_layer;
 static uint8_t	layer_offset;
 static uint8_t	current_row;
@@ -573,5 +578,3 @@ void main_key_loop() {
 // ---------------------------------------------------------------------------------
 // generated keyboard layout
 // ---------------------------------------------------------------------------------
-
-#include "./keyboard/layout.c"