diff --git a/src/main/drivers/flash.c b/src/main/drivers/flash.c
index 39be0e9d83..a7858d450b 100644
--- a/src/main/drivers/flash.c
+++ b/src/main/drivers/flash.c
@@ -519,7 +519,7 @@ static void flashConfigurePartitions(void)
     }
 #endif
 
-#if defined(FIRMWARE_SIZE)
+#if defined(FIRMWARE_SIZE) && defined(USE_FIRMWARE_PARTITION)
     const uint32_t firmwareSize = (FIRMWARE_SIZE * 1024);
     flashSector_t firmwareSectors = (firmwareSize / flashGeometry->sectorSize);