diff --git a/Modules/parsermodule.c b/Modules/parsermodule.c
index c90d34d..74af7fe 100644
--- a/Modules/parsermodule.c
+++ b/Modules/parsermodule.c
@@ -2385,6 +2385,11 @@
             for (pos = 1; res && (pos < nch); ++pos)
                 res = validate_ntype(CHILD(tree, pos), STRING);
             break;
+	  case DOT:
+	    res = (nch == 3 &&
+	           validate_ntype(CHILD(tree, 1), DOT) &&
+		   validate_ntype(CHILD(tree, 2), DOT));
+	    break;
           default:
             res = 0;
             break;