diff --git a/src/git/actions/commit.ts b/src/git/actions/commit.ts
index b53abc9..0771146 100644
--- a/src/git/actions/commit.ts
+++ b/src/git/actions/commit.ts
@@ -202,8 +202,10 @@ export async function openChanges(
 	commitOrRefs: GitCommit | { repoPath: string; ref1: string; ref2: string },
 	options?: TextDocumentShowOptions,
 ) {
+	const isArgCommit = isCommit(commitOrRefs);
+
 	if (typeof file === 'string') {
-		if (!isCommit(commitOrRefs)) throw new Error('Invalid arguments');
+		if (!isArgCommit) throw new Error('Invalid arguments');
 
 		const f = await commitOrRefs.findFile(file);
 		if (f == null) throw new Error('Invalid arguments');
@@ -213,17 +215,17 @@ export async function openChanges(
 
 	options = { preserveFocus: true, preview: false, ...options };
 
-	if (file.status === 'A') {
-		if (!isCommit(commitOrRefs)) return;
-
+	if (file.status === 'A' && isArgCommit) {
 		const commit = await commitOrRefs.getCommitForFile(file);
 		void executeCommand<DiffWithPreviousCommandArgs>(Commands.DiffWithPrevious, {
 			commit: commit,
 			showOptions: options,
 		});
+
+		return;
 	}
 
-	const refs = isCommit(commitOrRefs)
+	const refs = isArgCommit
 		? {
 				repoPath: commitOrRefs.repoPath,
 				// Don't need to worry about verifying the previous sha, as the DiffWith command will