diff --git a/src/tsconfig.strictNullChecks.json b/src/tsconfig.strictNullChecks.json
index 7b648f7a9e9..82c92f83b0d 100644
--- a/src/tsconfig.strictNullChecks.json
+++ b/src/tsconfig.strictNullChecks.json
@@ -509,6 +509,7 @@
 		"./vs/workbench/contrib/codeEditor/electron-browser/toggleRenderControlCharacter.ts",
 		"./vs/workbench/contrib/codeEditor/electron-browser/toggleRenderWhitespace.ts",
 		"./vs/workbench/contrib/codeEditor/electron-browser/toggleWordWrap.ts",
+		"./vs/workbench/contrib/codeinset/common/codeInset.ts",
 		"./vs/workbench/contrib/comments/common/commentModel.ts",
 		"./vs/workbench/contrib/comments/electron-browser/commentGlyphWidget.ts",
 		"./vs/workbench/contrib/comments/electron-browser/commentService.ts",