diff --git a/drivers/display_stm32f4discovery.cpp b/drivers/display_stm32f4discovery.cpp
index d733182e3823891f38be96e77dfc70a7a2d2fe85..ed8650b57dfbc8ba7e30547cb279bb59557ba64a 100644
--- a/drivers/display_stm32f4discovery.cpp
+++ b/drivers/display_stm32f4discovery.cpp
@@ -336,7 +336,8 @@ DisplayImpl::DisplayImpl()
         RCC->CR |= RCC_CR_PLLSAION;
     }
     
-    while((RCC->CR & RCC_CR_PLLSAIRDY)==0) ;
+    while((RCC->CR & RCC_CR_PLLSAIRDY)==0)
+        ;
     
     {
         FastInterruptDisableLock dLock;