--- a/cmake/XRootDOSDefs.cmake
+++ b/cmake/XRootDOSDefs.cmake
@@ -12,7 +12,7 @@
 #-------------------------------------------------------------------------------
 if( CMAKE_COMPILER_IS_GNUCXX )
   set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11" )
-  set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Werror" )
+  set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra" )
   set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-parameter" )
   # gcc 4.1 is retarded
   execute_process( COMMAND ${CMAKE_C_COMPILER} -dumpversion