diff --git a/src/Sound/voice.cxx b/src/Sound/voice.cxx
index 77b40821c..8e317d05c 100644
--- a/src/Sound/voice.cxx
+++ b/src/Sound/voice.cxx
@@ -20,10 +20,10 @@
 //
 // $Id$
 
+#include <Main/globals.hxx>
 #include <sstream>
 #include <simgear/compiler.h>
 #include <Main/fg_props.hxx>
-#include <Main/globals.hxx>
 #include "voice.hxx"
 
 #define VOICE "/sim/sound/voices"