diff --git a/extensions/git/src/commands.ts b/extensions/git/src/commands.ts
index c019cd96d11..1be1e4c1084 100644
--- a/extensions/git/src/commands.ts
+++ b/extensions/git/src/commands.ts
@@ -1554,7 +1554,7 @@ export class CommandCenter {
 
 		if (commit.parents.length > 1) {
 			const yes = localize('undo commit', "Undo merge commit");
-			const result = await window.showWarningMessage(localize('merge commit', "The last commit was a merge commit. Are you sure you want to undo it?"), yes);
+			const result = await window.showWarningMessage(localize('merge commit', "The last commit was a merge commit. Are you sure you want to undo it?"), { modal: true }, yes);
 
 			if (result !== yes) {
 				return;