diff --git a/CMakeModules/KiCadVersion.cmake b/CMakeModules/KiCadVersion.cmake
index 4f69587198..33ca25cbae 100644
--- a/CMakeModules/KiCadVersion.cmake
+++ b/CMakeModules/KiCadVersion.cmake
@@ -35,4 +35,4 @@
 # be set after each version tag is added to the git repo.  This will
 # give developers a reasonable idea where which branch was used to build
 # KiCad.
-set( KICAD_VERSION "5.1.0-rc2" )
+set( KICAD_VERSION "5.1.0-rc2-unknown" )