diff --git a/src/githubHelper.ts b/src/githubHelper.ts
index edbb68b..baeb065 100644
--- a/src/githubHelper.ts
+++ b/src/githubHelper.ts
@@ -1707,17 +1707,19 @@ export class GithubHelper {
     const ref = path && line ? `${path} line ${line}` : `${head_sha}`;
     let lineRef = `Commented on [${ref}](${repoLink}/compare/${base_sha}..${head_sha}${slug})\n\n`;
 
-    if (position.line_range.start.type === 'new') {
-      const startLine = position.line_range.start.new_line;
-      const endLine = position.line_range.end.new_line;
-      const lineRange = (startLine !== endLine) ? `L${startLine}-L${endLine}` : `L${startLine}`;
-      lineRef += `${repoLink}/blob/${head_sha}/${path}#${lineRange}\n\n`;
-    }
-    else {
-      const startLine = position.line_range.start.old_line;
-      const endLine = position.line_range.end.old_line;
-      const lineRange = (startLine !== endLine) ? `L${startLine}-L${endLine}` : `L${startLine}`;
-      lineRef += `${repoLink}/blob/${head_sha}/${path}#${lineRange}\n\n`;
+    if (position.line_range) {
+      if (position.line_range.start.type === 'new') {
+        const startLine = position.line_range.start.new_line;
+        const endLine = position.line_range.end.new_line;
+        const lineRange = (startLine !== endLine) ? `L${startLine}-L${endLine}` : `L${startLine}`;
+        lineRef += `${repoLink}/blob/${head_sha}/${path}#${lineRange}\n\n`;
+      }
+      else {
+        const startLine = position.line_range.start.old_line;
+        const endLine = position.line_range.end.old_line;
+        const lineRange = (startLine !== endLine) ? `L${startLine}-L${endLine}` : `L${startLine}`;
+        lineRef += `${repoLink}/blob/${head_sha}/${path}#${lineRange}\n\n`;
+      }
     }
 
     return lineRef;
diff --git a/src/settings.ts b/src/settings.ts
index b44ce8c..61db4a7 100644
--- a/src/settings.ts
+++ b/src/settings.ts
@@ -35,6 +35,7 @@ export default interface Settings {
     log: boolean;
   };
   s3?: S3Settings;
+  commitMap: Record<string, string>
 }
 
 export interface GithubSettings {