diff --git a/src/assay.cc b/src/assay.cc
index f7290b5a..d26f5f99 100644
--- a/src/assay.cc
+++ b/src/assay.cc
@@ -560,6 +560,8 @@ int Assay::processRequestBody() {
     store_variable("FULL_REQUEST_LENGTH", std::to_string(fullRequest.size()));
 
     store_variable("REQUEST_BODY", m_requestBody.str());
+    store_variable("REQUEST_BODY_LENGTH",
+        std::to_string(m_requestBody.str().size()));
 
     this->m_rules->evaluate(ModSecurity::RequestBodyPhase, this);
     return 0;
diff --git a/test/test-cases/regression/variable-REQUEST_BODY_LENGTH.json b/test/test-cases/regression/variable-REQUEST_BODY_LENGTH.json
new file mode 100644
index 00000000..7e0f51c8
--- /dev/null
+++ b/test/test-cases/regression/variable-REQUEST_BODY_LENGTH.json
@@ -0,0 +1,63 @@
+[  
+  {  
+    "enabled":1,
+    "version_min":300000,
+    "title":"Testing Variables :: REQUEST_BODY_LENGTH",
+    "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":"*/*",
+        "Content-Length":"330",
+        "Content-Type":"multipart/form-data; boundary=--------------------------756b6d74fa1a8ee2",
+        "Expect":"100-continue"
+      },
+      "uri":"/",
+      "protocol":"POST",
+      "body":[  
+        "--------------------------756b6d74fa1a8ee2",
+        "Content-Disposition: form-data; name=\"name\"",
+        "",
+        "test",
+        "--------------------------756b6d74fa1a8ee2",
+        "Content-Disposition: form-data; name=\"filedata\"; filename=\"small_text_file.txt\"",
+        "Content-Type: text/plain",
+        "",
+        "This is a very small test file..",
+        "--------------------------756b6d74fa1a8ee2",
+        "Content-Disposition: form-data; name=\"filedata\"; filename=\"small_text_file.txt\"",
+        "Content-Type: text/plain",
+        "",
+        "This is another very small test file..",
+        "--------------------------756b6d74fa1a8ee2--"
+      ]
+    },
+    "response":{  
+      "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: \"508\" \\(Variable: REQUEST_BODY_LENGTH\\)"
+    },
+    "rules":[  
+      "SecRuleEngine On",
+      "SecDebugLog \/tmp\/modsec_debug.log",
+      "SecDebugLogLevel 9",
+      "SecRule REQUEST_BODY_LENGTH \"@contains small_text_file.txt\" \"phase:3,pass,t:trim\""
+    ]
+  }
+]
\ No newline at end of file