diff --git a/core/src/main/java/org/nanohttpd/protocols/http/HTTPSession.java b/core/src/main/java/org/nanohttpd/protocols/http/HTTPSession.java
index 80456b06..28270423 100644
--- a/core/src/main/java/org/nanohttpd/protocols/http/HTTPSession.java
+++ b/core/src/main/java/org/nanohttpd/protocols/http/HTTPSession.java
@@ -158,6 +158,7 @@ private void decodeHeader(BufferedReader in, Map<String, String> pre, Map<String
                 uri = NanoHTTPD.decodePercent(uri.substring(0, qmi));
             } else {
                 uri = NanoHTTPD.decodePercent(uri);
+                this.queryParameterString = "";
             }
 
             // If there's another token, its protocol version,