diff --git a/ble/blecommon.h b/ble/blecommon.h
index 7a6cd59..b572f08 100644
--- a/ble/blecommon.h
+++ b/ble/blecommon.h
@@ -127,7 +127,7 @@ enum ble_error_t {
 };
 
 /** @brief Default MTU size. */
-static const unsigned GATT_MTU_SIZE_DEFAULT = 23;
+static const unsigned BLE_GATT_MTU_SIZE_DEFAULT = 23;
 
 #ifdef __cplusplus
 }
diff --git a/ble/services/UARTService.h b/ble/services/UARTService.h
index 2b0ef49..3ba367b 100644
--- a/ble/services/UARTService.h
+++ b/ble/services/UARTService.h
@@ -41,7 +41,7 @@ extern const uint8_t  UARTServiceRXCharacteristicUUID[UUID::LENGTH_OF_LONG_UUID]
 class UARTService {
 public:
     /**< Maximum length of data (in bytes) that can be transmitted by the UART service module to the peer. */
-    static const unsigned BLE_UART_SERVICE_MAX_DATA_LEN = (GATT_MTU_SIZE_DEFAULT - 3);
+    static const unsigned BLE_UART_SERVICE_MAX_DATA_LEN = (BLE_GATT_MTU_SIZE_DEFAULT - 3);
 
 public: