diff --git a/src/Sound/fg_fx.cxx b/src/Sound/fg_fx.cxx
index b2196b7a5..5840456c3 100644
--- a/src/Sound/fg_fx.cxx
+++ b/src/Sound/fg_fx.cxx
@@ -173,6 +173,7 @@ FGFX::update (double dt)
 void
 FGFX::play_message( SGSoundSample *_sample )
 {
+    _sample->set_volume( 1.0 );
     _samplequeue.push( _sample );
 }
 void
diff --git a/src/Sound/fg_fx.hxx b/src/Sound/fg_fx.hxx
index 61aee36ec..08d690c88 100644
--- a/src/Sound/fg_fx.hxx
+++ b/src/Sound/fg_fx.hxx
@@ -24,6 +24,10 @@
 #ifndef __FGFX_HXX
 #define __FGFX_HXX 1
 
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
 #include <simgear/compiler.h>
 
 #include <queue>