diff --git a/CMakeModules/KiCadVersion.cmake b/CMakeModules/KiCadVersion.cmake
index 79acd88d91..df024d4ee3 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-rc1" )
+set( KICAD_VERSION "5.1.0-rc1-unknown" )