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diff --git a/src/flow-var.h b/src/flow-var.h
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+/* Copyright (C) 2007-2013 Open Information Security Foundation
+ *
+ * You can copy, redistribute or modify this Program under the terms of
+ * the GNU General Public License version 2 as published by the Free
+ * Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/**
+ * \file
+ *
+ * \author Victor Julien <victor@inliniac.net>
+ * \author Pablo Rincon <pablo.rincon.crespo@gmail.com>
+ */
+
+#ifndef __FLOW_VAR_H__
+#define __FLOW_VAR_H__
+
+#include "flow.h"
+#include "util-var.h"
+
+/** Available data types for Flowvars */
+
+#define FLOWVAR_TYPE_STR 1
+#define FLOWVAR_TYPE_INT 2
+
+/** Struct used to hold the string data type for flowvars */
+typedef struct FlowVarTypeStr {
+    uint8_t *value;
+    uint16_t value_len;
+} FlowVarTypeStr;
+
+/** Struct used to hold the integer data type for flowvars */
+typedef struct FlowVarTypeInt_ {
+    uint32_t value;
+} FlowVarTypeInt;
+
+/** Generic Flowvar Structure */
+typedef struct FlowVar_ {
+    uint8_t type;       /* type, DETECT_FLOWVAR in this case */
+    uint8_t datatype;
+    uint16_t keylen;
+    uint32_t idx;       /* name idx */
+    GenericVar *next;   /* right now just implement this as a list,
+                         * in the long run we have think of something
+                         * faster. */
+    union {
+        FlowVarTypeStr fv_str;
+        FlowVarTypeInt fv_int;
+    } data;
+    uint8_t *key;
+} FlowVar;
+
+/** Flowvar Interface API */
+
+void FlowVarAddIdValue(Flow *, uint32_t id, uint8_t *value, uint16_t size);
+void FlowVarAddKeyValue(Flow *f, uint8_t *key, uint16_t keysize, uint8_t *value, uint16_t size);
+
+void FlowVarAddIntNoLock(Flow *, uint32_t, uint32_t);
+void FlowVarAddInt(Flow *, uint32_t, uint32_t);
+FlowVar *FlowVarGet(Flow *, uint32_t);
+FlowVar *FlowVarGetByKey(Flow *f, const uint8_t *key, uint16_t keylen);
+void FlowVarFree(FlowVar *);
+void FlowVarPrint(GenericVar *);
+
+#endif /* __FLOW_VAR_H__ */
+