diff --git a/src/OpenThreads/CMakeLists.txt b/src/OpenThreads/CMakeLists.txt
index b3cafb424..f2d48d429 100644
--- a/src/OpenThreads/CMakeLists.txt
+++ b/src/OpenThreads/CMakeLists.txt
@@ -44,6 +44,14 @@ IF(MSVC)
 ENDIF()
 
 
+################################################################################
+## Quieten warnings that a due to optional code paths
+
+IF(CMAKE_COMPILER_IS_GNUCXX)
+    # Remove -Wextra flag as it barfs on ffmoeg headers
+   STRING(REGEX REPLACE "-Wextra" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+ENDIF()
+
 # INSTALL_FILES(/include/OpenThreads/ FILES "${OPENTHREADS_CONFIG_HEADER}")
 
 ################################################################################