diff --git a/arch/arm/src/stm32/stm32_allocateheap.c b/arch/arm/src/stm32/stm32_allocateheap.c
index ecfcdb09a03..cef41929e17 100644
--- a/arch/arm/src/stm32/stm32_allocateheap.c
+++ b/arch/arm/src/stm32/stm32_allocateheap.c
@@ -203,7 +203,7 @@
           * should be 3.
           */
 
-#        ifdef (CONFIG_STM32_DMA)
+#        ifdef CONFIG_STM32_DMA
 #          warning "CCM SRAM is included in the heap AND DMA is enabled"
 #        endif
 #        if CONFIG_MM_REGIONS != 3