diff --git a/scripts/ExternalInterfaces/CMakeLists.txt b/scripts/ExternalInterfaces/CMakeLists.txt
index 8c4772a279c0a29621ef40c528deafb9164c575f..6d3bfdc13c68e7b1c3e2445a13ea2cbb34b786aa 100644
--- a/scripts/ExternalInterfaces/CMakeLists.txt
+++ b/scripts/ExternalInterfaces/CMakeLists.txt
@@ -6,7 +6,7 @@ set ( _mslice_external_root ${CMAKE_CURRENT_BINARY_DIR}/mslice )
 ExternalProject_Add ( mslice
   PREFIX ${_mslice_external_root}
   GIT_REPOSITORY "https://github.com/mantidproject/mslice.git"
-  GIT_TAG ce0a3647d111bc31fafd00addb64913760828352
+  GIT_TAG 3c6eadfe38ea9d57dcacf57f5df2c150639a2779
   EXCLUDE_FROM_ALL 1
 
   CONFIGURE_COMMAND ""