diff --git a/src/platforms/stm32/cmake/compile-flags.cmake b/src/platforms/stm32/cmake/compile-flags.cmake
index 1eeb5f6b5..759c0a2f7 100644
--- a/src/platforms/stm32/cmake/compile-flags.cmake
+++ b/src/platforms/stm32/cmake/compile-flags.cmake
@@ -36,6 +36,7 @@ set(CXX_WARN_FLAGS "${COMMON_WARN_FLAGS}")
 # Use C and C++ compiler optimizatons for size and speed.
 if (${CMAKE_FLASH_SIZE} STREQUAL "ROM_512K")
 set(OPTIMIZE_FLAG "-Os")
+set(LINKER_FLAGS "${LINKER_FLAGS} -specs=nano.specs")
 else()
 set(OPTIMIZE_FLAG "-O2")
 endif()