diff --git a/indra/cmake/Variables.cmake b/indra/cmake/Variables.cmake
index 88cfdfc0b9e677532c58fe5cfe88a312739464e3..ed5e2dee2d4154c3a9892ae865d1804b735a73a7 100644
--- a/indra/cmake/Variables.cmake
+++ b/indra/cmake/Variables.cmake
@@ -148,7 +148,7 @@ For more information, please see JIRA DEV-14943 - Cmake Linux cannot build both
 endif (LINUX AND SERVER AND VIEWER)
 
 
-set(USE_PRECOMPILED_HEADERS ON CACHE BOOL "Enable use of precompiled header directives where supported.")
+set(USE_PRECOMPILED_HEADERS OFF CACHE BOOL "Enable use of precompiled header directives where supported.")
 
 source_group("CMake Rules" FILES CMakeLists.txt)