diff --git a/platform/util/src/com/intellij/openapi/application/JetBrainsProtocolHandler.java b/platform/util/src/com/intellij/openapi/application/JetBrainsProtocolHandler.java
index b4de8218120a..d2e3ff0440fc 100644
--- a/platform/util/src/com/intellij/openapi/application/JetBrainsProtocolHandler.java
+++ b/platform/util/src/com/intellij/openapi/application/JetBrainsProtocolHandler.java
@@ -44,6 +44,8 @@ public class JetBrainsProtocolHandler {
       return;
     }
     String platformPrefix = urlParts.get(0);
+    ourMainParameter = null;
+    ourParameters.clear();
     ourCommand = urlParts.get(1);
     if (urlParts.size() > 2) {
       url = url.substring(platformPrefix.length() + 1 + ourCommand.length() + 1);