diff --git a/keyboards/nk65/config.h b/keyboards/nk65/config.h
index 826e54180c2..f9845f6789c 100755
--- a/keyboards/nk65/config.h
+++ b/keyboards/nk65/config.h
@@ -144,3 +144,14 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // VIA lighting is handled by the keyboard-level code
 #define VIA_CUSTOM_LIGHTING_ENABLE
+
+/* Custom EEPROM start addressing. This is to support
+ * both 128kb and 256kb versions of F303.
+ * Register 0x1FFFF7CC holds the size of the flash memory.
+ */
+#define EEPROM_START_ADDRESS
+#define FEE_MCU_FLASH_SIZE                              \
+({                                                      \
+    uint16_t (*flash_size) = (uint16_t*)FLASHSIZE_BASE;  \
+    *flash_size;                                        \
+})
diff --git a/keyboards/nk65/nk65.c b/keyboards/nk65/nk65.c
index 972373e1b25..fae30ac75c9 100755
--- a/keyboards/nk65/nk65.c
+++ b/keyboards/nk65/nk65.c
@@ -20,7 +20,7 @@
 #include "nk65.h"
 #include "drivers/issi/is31fl3733.h"
 
-/* Indicator LEDS are part of the LED driver 
+/* Indicator LEDS are part of the LED driver
  * Top LED is blue only. LED driver 2 RGB 7 Green channel
  * Middle LED is blue and red. LED driver 2 RGB 6 Red and Blue channel
  * Bottom LED is red only LED driver 2 RGB 6 Green channel.
@@ -48,7 +48,7 @@ __attribute__((weak)) layer_state_t layer_state_set_user(layer_state_t state) {
     if (state & (1UL << 2)) {
         G = 255;
     }
-    
+
     IS31FL3733_set_color( 6+64-1, R, G, B );
   return state;
 }