diff --git a/typings/xterm-headless.d.ts b/typings/xterm-headless.d.ts
index 2ceb6a94..741bce85 100644
--- a/typings/xterm-headless.d.ts
+++ b/typings/xterm-headless.d.ts
@@ -999,6 +999,8 @@ declare module 'xterm-headless' {
     isInvisible(): number;
     /** Whether the cell has the strikethrough attribute (CSI 9 m). */
     isStrikethrough(): number;
+    /** Whether the cell has the overline attribute (CSI 53 m). */
+    isOverline(): number;
 
     /** Whether the cell is using the RGB foreground color mode. */
     isFgRGB(): boolean;
diff --git a/typings/xterm.d.ts b/typings/xterm.d.ts
index 68b37153..6a9be2f1 100644
--- a/typings/xterm.d.ts
+++ b/typings/xterm.d.ts
@@ -1516,6 +1516,8 @@ declare module 'xterm' {
     isInvisible(): number;
     /** Whether the cell has the strikethrough attribute (CSI 9 m). */
     isStrikethrough(): number;
+    /** Whether the cell has the overline attribute (CSI 53 m). */
+    isOverline(): number;
 
     /** Whether the cell is using the RGB foreground color mode. */
     isFgRGB(): boolean;