diff --git a/os/hal/ports/STM32/LLD/BDMAv1/stm32_bdma.c b/os/hal/ports/STM32/LLD/BDMAv1/stm32_bdma.c
index 52e42e49c..4ca2e417b 100644
--- a/os/hal/ports/STM32/LLD/BDMAv1/stm32_bdma.c
+++ b/os/hal/ports/STM32/LLD/BDMAv1/stm32_bdma.c
@@ -310,6 +310,7 @@ const stm32_bdma_stream_t *bdmaStreamAllocI(uint32_t id,
   }
   else {
     osalDbgCheck(false);
+    return NULL;
   }
 
   for (i = startid; i <= endid; i++) {