diff --git a/watchdog/handler.go b/watchdog/handler.go
index 7d8e7cea..76402cc2 100644
--- a/watchdog/handler.go
+++ b/watchdog/handler.go
@@ -228,7 +228,9 @@ func getAdditionalEnvs(config *WatchdogConfig, r *http.Request, method string) [
 		}
 
 		envs = append(envs, fmt.Sprintf("Http_Method=%s", method))
+		// DEPRECATED: Http_ContentLength will be deprecated in favour
 		envs = append(envs, fmt.Sprintf("Http_ContentLength=%d", r.ContentLength))
+		envs = append(envs, fmt.Sprintf("Http_Content_Length=%d", r.ContentLength))
 
 		if config.writeDebug {
 			log.Println("Query ", r.URL.RawQuery)