diff --git a/Makefile.am b/Makefile.am
index 10141828..54f2666e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -219,3 +219,4 @@ TESTS+=test/test-cases/regression/variable-REQBODY_PROCESSOR_ERROR.json
 TESTS+=test/test-cases/regression/variable-URLENCODED_ERROR.json
 TESTS+=test/test-cases/regression/variable-RULE.json
 TESTS+=test/test-cases/regression/variable-STATUS.json
+TESTS+=test/test-cases/regression/variable-RESPONSE_PROTOCOL.json
diff --git a/src/transaction.cc b/src/transaction.cc
index 89f2b56b..4f350ec4 100644
--- a/src/transaction.cc
+++ b/src/transaction.cc
@@ -838,6 +838,7 @@ int Transaction::processResponseHeaders(int code, const std::string& proto) {
 
     this->m_httpCodeReturned = code;
     this->m_collections.store("STATUS", std::to_string(code));
+    m_collections.store("RESPONSE_PROTOCOL", proto);
 
     if (m_rules->secRuleEngine == Rules::DisabledRuleEngine) {
 #ifndef NO_LOGS
diff --git a/test/regression/regression.cc b/test/regression/regression.cc
index 4c84949d..d7905667 100644
--- a/test/regression/regression.cc
+++ b/test/regression/regression.cc
@@ -291,7 +291,7 @@ void perform_unit_test(ModSecurityTest<RegressionTest> *test,
                 headers.second.c_str());
         }
 
-        modsec_transaction->processResponseHeaders(r.status, "HTTP 1.1");
+        modsec_transaction->processResponseHeaders(r.status, t->response_protocol);
         actions(&r, modsec_transaction);
 #if 0
         if (r.status != 200) {
diff --git a/test/regression/regression_test.cc b/test/regression/regression_test.cc
index 4e175599..9da08dfa 100644
--- a/test/regression/regression_test.cc
+++ b/test/regression/regression_test.cc
@@ -169,6 +169,9 @@ RegressionTest *RegressionTest::from_yajl_node(const yajl_val &node) {
                 if (strcmp(key2, "body") == 0) {
                     u->response_body = yajl_array_to_str(val2);
                 }
+                if (strcmp(key2, "protocol") == 0) {
+                    u->response_protocol = YAJL_GET_STRING(val2);
+                }
             }
         }
         if (strcmp(key, "expected") == 0) {
diff --git a/test/regression/regression_test.h b/test/regression/regression_test.h
index 75b9a00a..3ba30edf 100644
--- a/test/regression/regression_test.h
+++ b/test/regression/regression_test.h
@@ -48,6 +48,7 @@ class RegressionTest {
     std::unordered_map<std::string, std::string> response_headers;
     std::string request_body;
     std::string response_body;
+    std::string response_protocol;
 
     std::string audit_log;
     std::string debug_log;
diff --git a/test/test-cases/regression/variable-RESPONSE_PROTOCOL.json b/test/test-cases/regression/variable-RESPONSE_PROTOCOL.json
new file mode 100644
index 00000000..c5a5dcdd
--- /dev/null
+++ b/test/test-cases/regression/variable-RESPONSE_PROTOCOL.json
@@ -0,0 +1,46 @@
+[  
+  {  
+    "enabled":1,
+    "version_min":300000,
+    "title":"Testing Variables :: RESPONSE_PROTOCOL",
+    "client":{  
+      "ip":"200.249.12.31",
+      "port":123
+    },
+    "server":{  
+      "ip":"200.249.12.31",
+      "port":80
+    },
+    "request":{  
+      "headers":{  
+        "Host":"localhost",
+        "User-Agent":"curl/7.38.0",
+        "Accept":"*/*"
+      },
+      "uri":"/?key=value&key=other_value",
+      "method":"GET",
+      "http_version":1.1
+    },
+    "response":{  
+      "protocol": "HTTP/1.1",
+      "headers":{  
+        "Date":"Mon, 13 Jul 2015 20:02:41 GMT",
+        "Last-Modified":"Sun, 26 Oct 2014 22:33:37 GMT",
+        "Content-Type":"text/html"
+      },
+      "body":[  
+        "no need."
+      ]
+    },
+    "expected":{  
+      "debug_log":"Target value: \"HTTP/1.1\" \\(Variable: RESPONSE_PROTOCOL\\)"
+    },
+    "rules":[  
+      "SecRuleEngine On",
+      "SecDebugLog \/tmp\/modsec_debug.log",
+      "SecDebugLogLevel 9",
+      "SecRule RESPONSE_PROTOCOL \"^HTTP\" \"id:1,phase:5,pass,t:trim\""
+    ]
+  }
+]
+