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diff --git a/src/util-mpm-ac.h b/src/util-mpm-ac.h
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+/* Copyright (C) 2007-2014 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 Anoop Saldanha <anoopsaldanha@gmail.com>
+ *
+ */
+
+#ifndef __UTIL_MPM_AC__H__
+#define __UTIL_MPM_AC__H__
+
+#include "util-mpm.h"
+
+#define SC_AC_STATE_TYPE_U16 uint16_t
+#define SC_AC_STATE_TYPE_U32 uint32_t
+
+typedef struct SCACPatternList_ {
+    uint8_t *cs;
+    uint16_t patlen;
+
+    uint16_t offset;
+    uint16_t depth;
+
+    /* sid(s) for this pattern */
+    uint32_t sids_size;
+    SigIntId *sids;
+} SCACPatternList;
+
+typedef struct SCACOutputTable_ {
+    /* list of pattern sids */
+    uint32_t *pids;
+    /* no of entries we have in pids */
+    uint32_t no_of_entries;
+} SCACOutputTable;
+
+typedef struct SCACCtx_ {
+    /* pattern arrays.  We need this only during the goto table creation phase */
+    MpmPattern **parray;
+
+    /* no of states used by ac */
+    uint32_t state_count;
+
+    uint32_t pattern_id_bitarray_size;
+
+    /* the all important memory hungry state_table */
+    SC_AC_STATE_TYPE_U16 (*state_table_u16)[256];
+    /* the all important memory hungry state_table */
+    SC_AC_STATE_TYPE_U32 (*state_table_u32)[256];
+
+    /* goto_table, failure table and output table.  Needed to create state_table.
+     * Will be freed, once we have created the state_table */
+    int32_t (*goto_table)[256];
+    int32_t *failure_table;
+    SCACOutputTable *output_table;
+    SCACPatternList *pid_pat_list;
+
+    /* the size of each state */
+    uint32_t single_state_size;
+
+    uint32_t allocated_state_count;
+
+} SCACCtx;
+
+typedef struct SCACThreadCtx_ {
+    /* the total calls we make to the search function */
+    uint32_t total_calls;
+    /* the total patterns that we ended up matching against */
+    uint64_t total_matches;
+} SCACThreadCtx;
+
+void MpmACRegister(void);
+
+#endif /* __UTIL_MPM_AC__H__ */