diff --git a/radio/src/Makefile b/radio/src/Makefile
index 77ed47444..f3dcf7d74 100644
--- a/radio/src/Makefile
+++ b/radio/src/Makefile
@@ -377,7 +377,7 @@ IMG2LBM = -$(PYTHON) ../util/img2lbm.py
 BIN2LBM = -$(PYTHON) ../util/bin2lbm.py
 FONT2PNG = -$(PYTHON) ../util/font2png.py
 TRANSLATE = -$(PYTHON) ../util/translate.py
-VERSION = 2.1.1
+VERSION = 2.1.1$(OPENTX_VERSION_SUFFIX)
 
 THIRDPARTY = thirdparty
 COOSDIR = $(THIRDPARTY)/CoOS