diff --git a/Makefile b/Makefile
index 38de4ca52..ef3e474e1 100644
--- a/Makefile
+++ b/Makefile
@@ -110,7 +110,7 @@ endif
 
 LD_SCRIPT	 = $(LINKER_DIR)/stm32_flash_f303_$(FLASH_SIZE)k.ld
 
-ARCH_FLAGS	 = -mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -mfpu=fpv4-sp-d16 -fsingle-precision-constant -Wdouble-promotion
+ARCH_FLAGS	 = -mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fsingle-precision-constant -Wdouble-promotion
 DEVICE_FLAGS = -DSTM32F303xC -DSTM32F303
 TARGET_FLAGS = -D$(TARGET)
 ifeq ($(TARGET),CHEBUZZF3)