diff --git a/src/x9d/hal.h b/src/x9d/hal.h
index 49a8eef3c..e65ecdfd2 100644
--- a/src/x9d/hal.h
+++ b/src/x9d/hal.h
@@ -167,20 +167,20 @@
 //#define CODEC_I2S_MODE                 GPIO_Pin_  //Connect to GND=I2S_STANDARD
 
 // Eeprom 5137
-#if defined(REV4)
-  #define I2C_EE_GPIO                     GPIOB
-  #define I2C_EE_WP_GPIO                  GPIOB
-  #define I2C_EE_GPIO_CLK                 RCC_AHB1Periph_GPIOB
-  #define I2C_EE_SCL                      GPIO_Pin_6  //PB6
-  #define I2C_EE_SDA                      GPIO_Pin_7  //PB7
-  #define I2C_EE_WP                       GPIO_Pin_9  //PB9
+#if defined(REV3)
+#define I2C_EE_GPIO                     GPIOE
+#define I2C_EE_WP_GPIO                  GPIOB
+#define I2C_EE_GPIO_CLK                 RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOE
+#define I2C_EE_SCL                      GPIO_Pin_1  //PE1
+#define I2C_EE_SDA                      GPIO_Pin_0  //PE0
+#define I2C_EE_WP                       GPIO_Pin_9  //PB9
 #else
-  #define I2C_EE_GPIO                     GPIOE
-  #define I2C_EE_WP_GPIO                  GPIOB
-  #define I2C_EE_GPIO_CLK                 RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOE
-  #define I2C_EE_SCL                      GPIO_Pin_1  //PE1
-  #define I2C_EE_SDA                      GPIO_Pin_0  //PE0
-  #define I2C_EE_WP                       GPIO_Pin_9  //PB9
+#define I2C_EE_GPIO                     GPIOB
+#define I2C_EE_WP_GPIO                  GPIOB
+#define I2C_EE_GPIO_CLK                 RCC_AHB1Periph_GPIOB
+#define I2C_EE_SCL                      GPIO_Pin_6  //PB6
+#define I2C_EE_SDA                      GPIO_Pin_7  //PB7
+#define I2C_EE_WP                       GPIO_Pin_9  //PB9
 #endif
 
 // SD - SPI2