diff --git a/platformio/builder/scripts/atmelavr.py b/platformio/builder/scripts/atmelavr.py
index 2c6e7c29..ed090862 100644
--- a/platformio/builder/scripts/atmelavr.py
+++ b/platformio/builder/scripts/atmelavr.py
@@ -56,7 +56,7 @@ env.Replace(
         "-Os",
         "-mmcu=$BOARD_MCU",
         "-Wl,--gc-sections",
-        # "-Wl,--start-group"
+        "-Wl,--start-group"
     ],
 
     SIZEPRINTCMD='"$SIZETOOL" --mcu=$BOARD_MCU -C -d $SOURCES',