diff --git a/version0.7/pda.h b/version0.7/pda.h
index 0d8e619..cddf77e 100644
--- a/version0.7/pda.h
+++ b/version0.7/pda.h
@@ -235,3 +235,4 @@ class PDA
 			return;
 		}
 };
+#endif