Index: b/include/mailutils/gsasl.h
===================================================================
--- a/include/mailutils/gsasl.h	2010-02-28 19:02:50.000000000 +0000
+++ b/include/mailutils/gsasl.h	2010-02-28 19:02:57.000000000 +0000
@@ -31,7 +31,7 @@
 
 int mu_gsasl_module_init (enum mu_gocs_op, void *);
 
-struct mu_gsasl_module_data mu_gsasl_module_data;
+extern struct mu_gsasl_module_data mu_gsasl_module_data;
 
 #ifdef WITH_GSASL
 #include <gsasl.h>