diff --git a/src/uix/eidos/components/tooltip/tooltip.css b/src/uix/eidos/components/tooltip/tooltip.css
index 0aa5d9f18..f3a1fd3ad 100644
--- a/src/uix/eidos/components/tooltip/tooltip.css
+++ b/src/uix/eidos/components/tooltip/tooltip.css
@@ -103,6 +103,23 @@
 	vector-effect: non-scaling-stroke;
 }
 
+/* Pull the caret base into the panel by the border width (per side) so the fill
+ * covers the panel's border there and the side strokes continue the outline —
+ * otherwise the panel border draws a line across the caret base. Mirrors the
+ * popover recipe. */
+[data-tooltip-arrow][data-side='bottom'] {
+	margin-block-start: var(--tooltip-border-width);
+}
+[data-tooltip-arrow][data-side='top'] {
+	margin-block-end: var(--tooltip-border-width);
+}
+[data-tooltip-arrow][data-side='left'] {
+	margin-inline-end: var(--tooltip-border-width);
+}
+[data-tooltip-arrow][data-side='right'] {
+	margin-inline-start: var(--tooltip-border-width);
+}
+
 /* Outline variant: transparent bg → fill with the surface, stroke the edges. */
 [data-tooltip-content][data-variant='outline'] ~ [data-tooltip-arrow] polygon,
 [data-tooltip-content][data-variant='outline'] [data-tooltip-arrow] polygon {