diff --git a/web/js/WebPPTListener.ts b/web/js/WebPPTListener.ts
index cb5d412e..ca2a5862 100644
--- a/web/js/WebPPTListener.ts
+++ b/web/js/WebPPTListener.ts
@@ -81,7 +81,7 @@ namespace ppt {
         current_state.special[SpecialKey.SHIFT] = false;
         current_state.special[SpecialKey.WINDOWS] = false;
 
-        for(const code of Object.keys(current_state.keys))
+        for(const code of Object.keys(current_state))
             delete current_state[code];
 
         for(const hook of key_hooks_active)