diff --git a/src/main.c b/src/main.c
index dbe8910..5d9f877 100755
--- a/src/main.c
+++ b/src/main.c
@@ -5,6 +5,12 @@ int main(void)
     LTP1245_Init();
 
     // LTP1245_FeedPaper(10);
+    RCC->APB2ENR |= RCC_APB2ENR_IOPCEN;
+
+    GPIOC->CRH = (GPIOC->CRH
+        & ~(0x0f << (4 * PIN_LED - 32)))
+        | (0x01 << (4 * PIN_LED - 32))      // Output, max. 10 MHz
+        ;
 
     char buff[30];
     itoa(BUILD_NUMBER, buff, 10);