diff --git a/addons/addon-serialize/src/SerializeAddon.test.ts b/addons/addon-serialize/src/SerializeAddon.test.ts
index aacf76ed..069a0a04 100644
--- a/addons/addon-serialize/src/SerializeAddon.test.ts
+++ b/addons/addon-serialize/src/SerializeAddon.test.ts
@@ -149,17 +149,19 @@ describe('SerializeAddon', () => {
     });
 
     it('serializes rows within a provided range', async () => {
-      await writeP(terminal, 'hello\r\nworld');
+      await writeP(terminal, 'prompt>hello\r\nworld');
 
       const output = serializeAddon.serializeAsHTML({
         range: {
-          start: 0,
-          end: 0
+          startLine: 0,
+          endLine: 0,
+          startCol: 7
         }
       });
       const rowMatches = output.match(/<div><span>.*?<\/span><\/div>/g) || [];
       assert.equal(rowMatches.length, 1, output);
       assert.ok(rowMatches[0]?.includes('hello'));
+      assert.ok(!output.includes('prompt>'));
       assert.ok(!output.includes('world'));
     });
 
diff --git a/addons/addon-serialize/src/SerializeAddon.ts b/addons/addon-serialize/src/SerializeAddon.ts
index 317dec8d..c6a5483c 100644
--- a/addons/addon-serialize/src/SerializeAddon.ts
+++ b/addons/addon-serialize/src/SerializeAddon.ts
@@ -453,8 +453,8 @@ export class SerializeAddon implements ITerminalAddon , ISerializeApi {
     const range = options.range;
     if (range) {
       return handler.serialize({
-        start: { x: 0,             y: typeof range.start === 'number' ? range.start : range.start.line },
-        end:   { x: terminal.cols, y: typeof range.end   === 'number' ? range.end   : range.end.line   }
+        start: { x: range.startCol,             y: typeof range.startLine === 'number' ? range.startLine : range.startLine },
+        end:   { x: terminal.cols, y: typeof range.endLine   === 'number' ? range.endLine   : range.endLine   }
       });
     }
     if (!onlySelection) {
diff --git a/addons/addon-serialize/typings/addon-serialize.d.ts b/addons/addon-serialize/typings/addon-serialize.d.ts
index d8d5fe07..06f41752 100644
--- a/addons/addon-serialize/typings/addon-serialize.d.ts
+++ b/addons/addon-serialize/typings/addon-serialize.d.ts
@@ -92,9 +92,15 @@ declare module '@xterm/addon-serialize' {
     includeGlobalBackground: boolean;
 
      /**
-     * The row range to serialize. This is prioritized over {@link onlySelection}.
+     * The range to serialize. This is prioritized over {@link onlySelection}.
      */
-    range?: ISerializeRange;
+    range?: ISerializeBufferRange;
+  }
+
+  export interface ISerializeBufferRange {
+    startLine: number;
+    endLine: number;
+    startCol: number;
   }
 
   export interface ISerializeRange {