diff --git a/routers/web/repo/issue_content_history.go b/routers/web/repo/issue_content_history.go
index 23255e774f..bc0945c9d1 100644
--- a/routers/web/repo/issue_content_history.go
+++ b/routers/web/repo/issue_content_history.go
@@ -125,6 +125,10 @@ func GetContentHistoryDetail(ctx *context.Context) {
 		})
 		return
 	}
+	if history.IssueID != issue.ID {
+		ctx.NotFound("CompareRepoID", issues_model.ErrCommentNotExist{})
+		return
+	}
 
 	// get the related comment if this history revision is for a comment, otherwise the history revision is for an issue.
 	var comment *issues_model.Comment