diff --git a/simgear/sound/openal_test1.cxx b/simgear/sound/openal_test1.cxx
index 687df455..5342ddf1 100644
--- a/simgear/sound/openal_test1.cxx
+++ b/simgear/sound/openal_test1.cxx
@@ -97,10 +97,10 @@ int main( int argc, char *argv[] ) {
     ALfloat source_vel[3];
 
     // configuration values
-    ALenum format;
-    ALsizei size;
-    ALvoid* data;
-    ALsizei freq;
+//    ALenum format;
+//    ALsizei size;
+//    ALvoid* data;
+//    ALsizei freq;
     ALboolean loop = false;
 
     source_pos[0] = 0.0; source_pos[1] = 0.0; source_pos[2] = 0.0;