diff --git a/cmake/GtsamBuildTypes.cmake b/cmake/GtsamBuildTypes.cmake
index f00f3b3b1..51e66627d 100644
--- a/cmake/GtsamBuildTypes.cmake
+++ b/cmake/GtsamBuildTypes.cmake
@@ -102,7 +102,7 @@ if(    NOT cmake_build_type_tolower STREQUAL ""
 endif()
 
 # Mark that first pass is done
-set(FIRST_PASS_DONE TRUE CACHE BOOL "Internally used to mark whether cmake has been run multiple times" FORCE)
+set(FIRST_PASS_DONE TRUE CACHE INTERNAL "Internally used to mark whether cmake has been run multiple times")
 mark_as_advanced(FIRST_PASS_DONE) 
 
 # Enable Visual Studio solution folders