diff --git a/src/lib-sieve/sieve-storage.c b/src/lib-sieve/sieve-storage.c
index 6c8f1f46fa08be3ac4b663b2167b3208d4b302f8..5a9dda979cc0f0ee8e78ccdc2e73150a603cd2dc 100644
--- a/src/lib-sieve/sieve-storage.c
+++ b/src/lib-sieve/sieve-storage.c
@@ -310,7 +310,7 @@ sieve_storage_alloc_from_class(struct sieve_instance *svinst,
 
 	if ((flags & SIEVE_STORAGE_FLAG_SYNCHRONIZING) != 0 &&
 	    !storage_class->allows_synchronization) {
-		e_debug(event, "Storage does not support synchronization");
+		e_error(event, "Storage does not support synchronization");
 		*error_code_r = SIEVE_ERROR_NOT_POSSIBLE;
 		return -1;
 	}