diff --git a/radio/src/opentx.cpp b/radio/src/opentx.cpp
index aaafe8856..ff3b7f320 100644
--- a/radio/src/opentx.cpp
+++ b/radio/src/opentx.cpp
@@ -922,7 +922,7 @@ getvalue_t convert8bitsTelemValue(uint8_t channel, ls_telemetry_value_t value)
 #endif
 
 #if defined(FRSKY)&& !defined(CPUARM)
-void convertUnit(getvalue_t & val, uint8_t & unit)
+FORCEINLINE void convertUnit(getvalue_t & val, uint8_t & unit)
 {
   if (IS_IMPERIAL_ENABLE()) {
     if (unit == UNIT_TEMPERATURE) {
diff --git a/radio/util/checksize.py b/radio/util/checksize.py
index adfb07a6f..2dbdd9e0f 100755
--- a/radio/util/checksize.py
+++ b/radio/util/checksize.py
@@ -1,5 +1,11 @@
 #!/usr/bin/env python
 
+# The commands used to compare 2.2 flash usage
+# on 2.1 release: make PCB=9X EXT=FRSKY VOICE=YES AUDIO=YES AUTOSOURCE=YES AUTOSWITCH=YES HELI=YES TEMPLATES=YES GAUGES=NO
+#   => 64818 (program) + 3236 (data)
+# on 2.2 release: cmake -DPCB=9X -DEXT=FRSKY -DAUDIO=YES -DVOICE=YES -DHELI=YES -DTEMPLATES=YES ~/git/opentx
+#   => 64832 (program) + 3236 (data)
+
 import os
 import sys
 import subprocess