diff --git a/indra/llaudio/CMakeLists.txt b/indra/llaudio/CMakeLists.txt
index 92a5cfe22f..804b36b226 100644
--- a/indra/llaudio/CMakeLists.txt
+++ b/indra/llaudio/CMakeLists.txt
@@ -11,7 +11,7 @@ include(LLMath)
 include(LLMessage)
 include(LLFileSystem)
 
-include_directories(
+include_directories( SYSTEM
     ${LLAUDIO_INCLUDE_DIRS}
     ${LLCOMMON_INCLUDE_DIRS}
     ${LLMATH_INCLUDE_DIRS}