diff --git a/polygerrit-ui/app/elements/shared/gr-tooltip/gr-tooltip.js b/polygerrit-ui/app/elements/shared/gr-tooltip/gr-tooltip.ts
similarity index 100%
rename from polygerrit-ui/app/elements/shared/gr-tooltip/gr-tooltip.js
rename to polygerrit-ui/app/elements/shared/gr-tooltip/gr-tooltip.ts