diff --git a/Versions.cmake b/Versions.cmake
index 23334e5b1..8b3bcabfe 100644
--- a/Versions.cmake
+++ b/Versions.cmake
@@ -3,4 +3,4 @@ set (WSJTX_VERSION_MAJOR 2)
 set (WSJTX_VERSION_MINOR 1)
 set (WSJTX_VERSION_PATCH 1)
 set (WSJTX_RC 0)		 # release candidate number, comment out or zero for development versions
-set (WSJTX_VERSION_IS_RELEASE 0) # set to 1 for final release build
+set (WSJTX_VERSION_IS_RELEASE 1) # set to 1 for final release build