diff --git a/Code/Mantid/Build/CMake/PatchVersionNumber.cmake.in b/Code/Mantid/Build/CMake/PatchVersionNumber.cmake.in
index 1e5395423411ee316a2c288c374358ad6c1f09d4..e36c0cf8f01789c6d5fa84a97ed0e6bfc1dd0eec 100644
--- a/Code/Mantid/Build/CMake/PatchVersionNumber.cmake.in
+++ b/Code/Mantid/Build/CMake/PatchVersionNumber.cmake.in
@@ -1,4 +1,4 @@
 # This contains the 'patch' part of the version number, obtained from 'git describe' in CommonSetup.cmake
 
-set ( VERSION_PATCH "@MtdVersion_WC_LAST_CHANGED_REV@" )
+set ( VERSION_PATCH "@MtdVersion_WC_LAST_CHANGED_DATETIME@" )