diff --git a/common/Makefile.common b/common/Makefile.common
index aa93433aa..95820e667 100644
--- a/common/Makefile.common
+++ b/common/Makefile.common
@@ -65,8 +65,8 @@ endif
 
 # uncomment these two; to fix 256 vs 512kb PM3 devices
 # flashing bootrom -b is needed
-APP_CFLAGS += -DHAS_512_FLASH
-COMMON_FLAGS += -DHAS_512_FLASH
+#APP_CFLAGS += -DHAS_512_FLASH
+#COMMON_FLAGS += -DHAS_512_FLASH
 
 # Also search prerequisites in the common directory (for usb.c), the fpga directory (for fpga.bit), and the zlib directory
 VPATH = . ../common ../fpga ../zlib