diff --git a/tools/pylibopenflow/include/openflow.h b/tools/pylibopenflow/include/openflow.h
index 9e662aa..c0b5090 100644
--- a/tools/pylibopenflow/include/openflow.h
+++ b/tools/pylibopenflow/include/openflow.h
@@ -66,7 +66,7 @@
 /* The most significant bit being set in the version field indicates an
  * experimental OpenFlow version.
  */
-#define OFP_VERSION   0x99
+#define OFP_VERSION   0x01
 
 #define OFP_MAX_TABLE_NAME_LEN 32
 #define OFP_MAX_PORT_NAME_LEN  16