diff --git a/gtsam/CMakeLists.txt b/gtsam/CMakeLists.txt
index 37c4a1f88..e0e037f52 100644
--- a/gtsam/CMakeLists.txt
+++ b/gtsam/CMakeLists.txt
@@ -199,7 +199,7 @@ if(WIN32)
 else()
   if("${CMAKE_BUILD_TYPE}" STREQUAL "Release")
     # Suppress all warnings from 3rd party sources.
-    set_source_files_properties(${3rdparty_srcs} PROPERTIES COMPILE_FLAGS "-w")
+    set_source_files_properties(${3rdparty_srcs} PROPERTIES COMPILE_FLAGS "-w -Wno-everything")
   else()
     set_source_files_properties(${3rdparty_srcs} PROPERTIES COMPILE_FLAGS "-Wno-error")
   endif()