diff --git a/modules/http_proxy_js_response.go b/modules/http_proxy_js_response.go
index cea84cb1..c7469bc4 100644
--- a/modules/http_proxy_js_response.go
+++ b/modules/http_proxy_js_response.go
@@ -64,10 +64,14 @@ func (j *JSResponse) UpdateHash() {
 }
 
 func (j *JSResponse) WasModified() bool {
-	// body was read
 	if j.bodyRead == true {
+		// body was read
+		return true
+	} else if j.Body != "" {
+		// body was not read but just set
 		return true
 	}
+
 	// check if any of the fields has been changed
 	newHash := j.NewHash()
 	if newHash != j.refHash {