diff --git a/tabby-terminal/src/frontends/xtermFrontend.ts b/tabby-terminal/src/frontends/xtermFrontend.ts
index 110501d5..bfec1765 100644
--- a/tabby-terminal/src/frontends/xtermFrontend.ts
+++ b/tabby-terminal/src/frontends/xtermFrontend.ts
@@ -66,7 +66,7 @@ export class XTermFrontend extends Frontend {
     private configuredFontSize = 0
     private configuredLinePadding = 0
     private zoom = 0
-    resizeHandler: () => void
+    private resizeHandler: () => void
     private configuredTheme: ITheme = {}
     private copyOnSelect = false
     private preventNextOnSelectionChangeEvent = false