Index: generic/xotcl.c
===================================================================
diff -u -r0f217e762a596e3fafcc66c8e2e040be96bcbae7 -r1671480056524ca3d07e35307ebc26fa5811db74
--- generic/xotcl.c	(.../xotcl.c)	(revision 0f217e762a596e3fafcc66c8e2e040be96bcbae7)
+++ generic/xotcl.c	(.../xotcl.c)	(revision 1671480056524ca3d07e35307ebc26fa5811db74)
@@ -11229,7 +11229,7 @@
 
     case 'm':
       if (!strcmp(cmd, "mixinof")) {
-        XOTclObject *matchObject;
+        XOTclObject *matchObject = NULL;
         Tcl_DString ds, *dsPtr = &ds;
         int rc, withClosure = 0;