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diff --git a/src/vnet/ip/ip_flow_hash.h b/src/vnet/ip/ip_flow_hash.h
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+/*
+ * Copyright (c) 2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __IP_FLOW_HASH_H__
+#define __IP_FLOW_HASH_H__
+
+/** Flow hash configuration */
+#define IP_FLOW_HASH_SRC_ADDR (1<<0)
+#define IP_FLOW_HASH_DST_ADDR (1<<1)
+#define IP_FLOW_HASH_PROTO (1<<2)
+#define IP_FLOW_HASH_SRC_PORT (1<<3)
+#define IP_FLOW_HASH_DST_PORT (1<<4)
+#define IP_FLOW_HASH_REVERSE_SRC_DST (1<<5)
+#define IP_FLOW_HASH_SYMMETRIC (1<<6)
+
+/** Default: 5-tuple without the "reverse" bit */
+#define IP_FLOW_HASH_DEFAULT (0x1F)
+
+#define foreach_flow_hash_bit \
+_(src, IP_FLOW_HASH_SRC_ADDR) \
+_(dst, IP_FLOW_HASH_DST_ADDR) \
+_(sport, IP_FLOW_HASH_SRC_PORT) \
+_(dport, IP_FLOW_HASH_DST_PORT) \
+_(proto, IP_FLOW_HASH_PROTO) \
+_(reverse, IP_FLOW_HASH_REVERSE_SRC_DST) \
+_(symmetric, IP_FLOW_HASH_SYMMETRIC)
+
+/**
+ * A flow hash configuration is a mask of the flow hash options
+ */
+typedef u32 flow_hash_config_t;
+
+#endif /* __IP_TYPES_H__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */