diff --git a/src/main/main.c b/src/main/main.c
index f70a6d0..6e91afa 100644
--- a/src/main/main.c
+++ b/src/main/main.c
@@ -294,7 +294,7 @@ void SystemClock_Config(void)
     */
     RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_HSE;
     RCC_OscInitStruct.HSEState = RCC_HSE_ON; // RCC_HSE_BYPASS ?
-    RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
+    RCC_OscInitStruct.LSIState = RCC_LSI_ON;
     RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
     RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
     RCC_OscInitStruct.PLL.PLLM = 4;