--- a/common.c
+++ b/common.c
@@ -19,6 +19,8 @@
 *
 ***********************************************************************/
 
+options glopts;
+
 char *mode_names[4] = { "stereo", "j-stereo", "dual-ch", "single-ch" };
 char *version_names[2] = { "MPEG-2 LSF", "MPEG-1" };
 
--- a/options.h
+++ b/options.h
@@ -19,5 +19,5 @@
 }
 options;
 
-options glopts;
+extern options glopts;
 #endif