diff --git a/extensions/git/src/git.ts b/extensions/git/src/git.ts
index 83ff1af3d6a62978bd93dd2db035d75156404646..65fa0db40c596efe43b36ec81048f48ee8d6c21f 100644
--- a/extensions/git/src/git.ts
+++ b/extensions/git/src/git.ts
@@ -1173,7 +1173,7 @@ export class Repository {
 		}
 
 		if (options.prune) {
-			args.push('-p');
+			args.push('--prune');
 		}