diff --git a/common/modules/javascript.jsm b/common/modules/javascript.jsm
index b6abdb4d..22512c1c 100644
--- a/common/modules/javascript.jsm
+++ b/common/modules/javascript.jsm
@@ -805,6 +805,7 @@ var JavaScript = Module("javascript", {
 
                 this.completions.cleanup();
                 this.history.save();
+                this.history.reset();
                 this.updatePrompt();
 
                 modules.mow.resize();