diff --git a/.changeset/bright-melons-obey.md b/.changeset/bright-melons-obey.md
new file mode 100644
index 00000000000..5ef48a56eb8
--- /dev/null
+++ b/.changeset/bright-melons-obey.md
@@ -0,0 +1,5 @@
+---
+'@shopify/polaris': patch
+---
+
+Added `borderRadius` style to `TooltipOverlay`
diff --git a/polaris-react/src/components/Tooltip/components/TooltipOverlay/TooltipOverlay.scss b/polaris-react/src/components/Tooltip/components/TooltipOverlay/TooltipOverlay.scss
index b0715ea6982..dbbba1fe915 100644
--- a/polaris-react/src/components/Tooltip/components/TooltipOverlay/TooltipOverlay.scss
+++ b/polaris-react/src/components/Tooltip/components/TooltipOverlay/TooltipOverlay.scss
@@ -7,6 +7,8 @@
   margin: var(--pc-tooltip-overlay-offset) var(--p-space-4) var(--p-space-4);
   opacity: 1;
   box-shadow: var(--p-shadow-popover);
+  // stylelint-disable-next-line -- Polaris component custom properties
+  border-radius: var(--pc-tooltip-border-radius);
   pointer-events: none;
   will-change: opacity, left, top;
   transition: opacity var(--p-duration-200) var(--p-ease-in)