diff --git a/src/detect-engine-prefilter.c b/src/detect-engine-prefilter.c
index a7cc85f8db..dee4c316dc 100644
--- a/src/detect-engine-prefilter.c
+++ b/src/detect-engine-prefilter.c
@@ -48,6 +48,7 @@
 #include "suricata.h"
 
 #include "detect-engine-prefilter.h"
+#include "detect-engine-mpm.h"
 
 #include "app-layer-parser.h"
 #include "app-layer-htp.h"
@@ -323,6 +324,41 @@ void PrefilterFreeEngines(PrefilterEngine *list)
     }
 }
 
+void PrefilterSetupRuleGroup(DetectEngineCtx *de_ctx, SigGroupHead *sgh)
+{
+    BUG_ON(PatternMatchPrepareGroup(de_ctx, sgh) != 0);
+
+    if (de_ctx->prefilter_setting == DETECT_PREFILTER_AUTO) {
+        int i = 0;
+        for (i = 0; i < DETECT_TBLSIZE; i++)
+        {
+            if (sigmatch_table[i].SetupPrefilter != NULL) {
+                sigmatch_table[i].SetupPrefilter(sgh);
+            }
+        }
+    }
+
+#ifdef PROFILING
+    PrefilterEngine *e;
+    uint32_t engines = 0;
+    uint32_t tx_engines = 0;
+
+    for (e = sgh->pkt_engines ; e != NULL; e = e->next) {
+        engines++;
+        de_ctx->profile_prefilter_maxid = MAX(de_ctx->profile_prefilter_maxid, e->profile_id);
+    }
+    for (e = sgh->payload_engines ; e != NULL; e = e->next) {
+        engines++;
+        de_ctx->profile_prefilter_maxid = MAX(de_ctx->profile_prefilter_maxid, e->profile_id);
+    }
+    for (e = sgh->tx_engines ; e != NULL; e = e->next) {
+        tx_engines++;
+        de_ctx->profile_prefilter_maxid = MAX(de_ctx->profile_prefilter_maxid, e->profile_id);
+    }
+    SCLogDebug("SGH %p: engines %u tx_engines %u", sgh, engines, tx_engines);
+#endif
+}
+
 #ifdef PROFILING
 /* hash table for assigning a unique id to each engine type. */
 
diff --git a/src/detect-engine-prefilter.h b/src/detect-engine-prefilter.h
index 5ce32fea0a..7836bab39a 100644
--- a/src/detect-engine-prefilter.h
+++ b/src/detect-engine-prefilter.h
@@ -45,6 +45,8 @@ int PrefilterAppendTxEngine(SigGroupHead *sgh,
 
 void PrefilterFreeEngines(PrefilterEngine *list);
 
+void PrefilterSetupRuleGroup(DetectEngineCtx *de_ctx, SigGroupHead *sgh);
+
 #ifdef PROFILING
 const char *PrefilterStoreGetName(const uint32_t id);
 #endif
diff --git a/src/detect.c b/src/detect.c
index a955b5fe2a..900f824386 100644
--- a/src/detect.c
+++ b/src/detect.c
@@ -3787,37 +3787,7 @@ int SigAddressPrepareStage4(DetectEngineCtx *de_ctx)
         SigGroupHeadSetFilestoreCount(de_ctx, sgh);
         SCLogDebug("filestore count %u", sgh->filestore_cnt);
 
-        BUG_ON(PatternMatchPrepareGroup(de_ctx, sgh) != 0);
-
-        if (de_ctx->prefilter_setting == DETECT_PREFILTER_AUTO) {
-            int i = 0;
-            for (i = 0; i < DETECT_TBLSIZE; i++)
-            {
-                if (sigmatch_table[i].SetupPrefilter != NULL) {
-                    sigmatch_table[i].SetupPrefilter(sgh);
-                }
-            }
-        }
-
-#ifdef PROFILING
-        PrefilterEngine *e;
-        uint32_t engines = 0;
-        uint32_t tx_engines = 0;
-
-        for (e = sgh->pkt_engines ; e != NULL; e = e->next) {
-            engines++;
-            de_ctx->profile_prefilter_maxid = MAX(de_ctx->profile_prefilter_maxid, e->profile_id);
-        }
-        for (e = sgh->payload_engines ; e != NULL; e = e->next) {
-            engines++;
-            de_ctx->profile_prefilter_maxid = MAX(de_ctx->profile_prefilter_maxid, e->profile_id);
-        }
-        for (e = sgh->tx_engines ; e != NULL; e = e->next) {
-            tx_engines++;
-            de_ctx->profile_prefilter_maxid = MAX(de_ctx->profile_prefilter_maxid, e->profile_id);
-        }
-        SCLogDebug("SGH %p: engines %u tx_engines %u", sgh, engines, tx_engines);
-#endif
+        PrefilterSetupRuleGroup(de_ctx, sgh);
 
         SigGroupHeadBuildNonPrefilterArray(de_ctx, sgh);