diff --git a/content/api_en/LIB_serial/Serial_bufferUntil.xml b/content/api_en/LIB_serial/Serial_bufferUntil.xml
index da0335f6c..0a0bed6d8 100755
--- a/content/api_en/LIB_serial/Serial_bufferUntil.xml
+++ b/content/api_en/LIB_serial/Serial_bufferUntil.xml
@@ -39,7 +39,7 @@ void draw() {
 }
 
 void serialEvent(Serial p) {
-  inString = (myPort.readString());
+  inString = p.readString();
 }
 
 ]]></code>