diff --git a/packages/opencode/src/cli/cmd/tui/context/theme.tsx b/packages/opencode/src/cli/cmd/tui/context/theme.tsx
index c247640eba2..24d122162a5 100644
--- a/packages/opencode/src/cli/cmd/tui/context/theme.tsx
+++ b/packages/opencode/src/cli/cmd/tui/context/theme.tsx
@@ -962,6 +962,7 @@ function getSyntaxRules(theme: Theme) {
       style: {
         foreground: theme.markdownHeading,
         bold: true,
+        underline: true,
       },
     },
     {