diff --git a/src/lib-sieve/storage/file/sieve-file-storage.c b/src/lib-sieve/storage/file/sieve-file-storage.c
index 75558b60b865504c757dde2d26743219bb58a5ad..d928dedbe688071545eb5b729c5c4e0b745b6062 100644
--- a/src/lib-sieve/storage/file/sieve-file-storage.c
+++ b/src/lib-sieve/storage/file/sieve-file-storage.c
@@ -631,6 +631,8 @@ sieve_file_storage_autodetect(struct sieve_file_storage *fstorage,
 			*storage_path_r = "/sieve";
 			e_debug(storage->event,
 				"Directory `/sieve' exists, assuming chroot");
+		} else {
+			*storage_path_r = NULL;
 		}
 	}
 }