diff --git a/toolchain/toolchain-arm-none-eabi.cmake b/toolchain/toolchain-arm-none-eabi.cmake
index 51ac651a6..21cd66daa 100644
--- a/toolchain/toolchain-arm-none-eabi.cmake
+++ b/toolchain/toolchain-arm-none-eabi.cmake
@@ -26,7 +26,7 @@ set( CMAKE_OBJCOPY ${TC_PATH}${CROSS_COMPILE}objcopy
 set( CMAKE_OBJDUMP ${TC_PATH}${CROSS_COMPILE}objdump
     CACHE FILEPATH "The toolchain objdump command " FORCE )
 
-set(COMMON_FLAGS "-fno-builtin -ffunction-sections -fdata-sections -fno-strict-aliasing -fmessage-length=0")
+set(COMMON_FLAGS "-fno-common -fno-builtin -ffunction-sections -fdata-sections -fno-strict-aliasing -fmessage-length=0")
 set(CMAKE_C_FLAGS "${COMMON_FLAGS} -std=gnu99")
 set(CMAKE_CXX_FLAGS "${COMMON_FLAGS} -std=gnu++0x")
 set(CMAKE_EXE_LINKER_FLAGS "-Wl,-gc-sections --specs=nosys.specs -nostdlib -static -nostartfiles")