diff --git a/plugins/terminal/frontend/src/com/intellij/terminal/frontend/view/completion/TerminalLookupPrefixUpdater.kt b/plugins/terminal/frontend/src/com/intellij/terminal/frontend/view/completion/TerminalLookupPrefixUpdater.kt
index 49e8bf09587e..6a1e7b4d3d2f 100644
--- a/plugins/terminal/frontend/src/com/intellij/terminal/frontend/view/completion/TerminalLookupPrefixUpdater.kt
+++ b/plugins/terminal/frontend/src/com/intellij/terminal/frontend/view/completion/TerminalLookupPrefixUpdater.kt
@@ -127,6 +127,7 @@ class TerminalLookupPrefixUpdater private constructor(
       if (lookup.isLookupDisposed) {
         return
       }
+      lookup.fireBeforeAppendPrefix(c)
       lookup.appendPrefix(c)
     }
   }