diff --git a/Makefile b/Makefile
index c85e717..8c56312 100644
--- a/Makefile
+++ b/Makefile
@@ -206,7 +206,7 @@ ifeq ($(ENABLE_FEAT_F4HWN),1)
 	VERSION_STRING_1 ?= v0.22
 
 	AUTHOR_STRING_2 ?= F4HWN
-	VERSION_STRING_2 ?= v1.9
+	VERSION_STRING_2 ?= v1.9b
 
 	AUTHOR_STRING ?= $(AUTHOR_STRING_1)+$(AUTHOR_STRING_2)
 	VERSION_STRING ?= $(VERSION_STRING_2)