--- src/dfa.c
+++ src/dfa.c
@@ -587,7 +587,7 @@
 		      work_mbc->coll_elems[work_mbc->ncoll_elems++] = elem;
 		    }
  		}
-	      wc = WEOF;
+	      wc = wc1 = WEOF;
 	    }
 	  else
 	    /* We treat '[' as a normal character here.  */