diff --git a/apache2/msc_pcre.c b/apache2/msc_pcre.c
index 2faaf590..8ca588a9 100644
--- a/apache2/msc_pcre.c
+++ b/apache2/msc_pcre.c
@@ -62,7 +62,11 @@ void *msc_pregcomp_ex(apr_pool_t *pool, const char *pattern, int options,
     if (regex->re == NULL) return NULL;
 
     #ifdef WITH_PCRE_STUDY
-    pe = pcre_study(regex->re, 0, &errptr);
+        #ifdef WITH_PCRE_JIT
+                pe = pcre_study(regex->re, PCRE_STUDY_JIT_COMPILE, &errptr);
+        #else
+                pe = pcre_study(regex->re, 0, &errptr);
+        #endif
     #endif
 
     /* Setup the pcre_extra record if pcre_study did not already do it */
diff --git a/configure.ac b/configure.ac
index 705a3d51..ef2210a2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -250,6 +250,24 @@ AC_ARG_ENABLE(pcre-study,
   pcre_study='-DWITH_PCRE_STUDY'
 ])
 
+# Add PCRE JIT
+
+AC_ARG_ENABLE(pcre-jit,
+              AS_HELP_STRING([--enable-pcre-jit],
+                             [Enable PCRE regex jit support during configure.]),
+[
+  if test "$enableval" != "no"; then
+    pcre_jit='-DWITH_PCRE_JIT'
+    MODSEC_EXTRA_CFLAGS="$MODSEC_EXTRA_CFLAGS $pcre_jit"
+  else
+    pcre_jit=''
+  fi
+],
+[
+  pcre_jit=''
+])
+
+
 # Limit PCRE matching
 AC_ARG_ENABLE(pcre-match-limit,
               AS_HELP_STRING([--enable-pcre-match-limit],