diff --git a/src/GAudioOutput.cc b/src/GAudioOutput.cc
index 01723fffbf77eb9ca3fd361ba8bc2ee3c083a16c..36ca4dd5c14898ab032268121bbbf63a60ad19d8 100644
--- a/src/GAudioOutput.cc
+++ b/src/GAudioOutput.cc
@@ -41,7 +41,7 @@ This file is part of the PIXHAWK project
 
 #include <QDebug>
 
-#ifndef Q_OS_MAC
+#ifdef Q_OS_LINUX
 extern "C" {
 #include <cmu_us_awb/voxdefs.h>
     //#include <cmu_us_slt/voxdefs.h>