diff --git a/src/barebox-state/backend_bucket_circular.c b/src/barebox-state/backend_bucket_circular.c
index 58fffd1..5a525f6 100644
--- a/src/barebox-state/backend_bucket_circular.c
+++ b/src/barebox-state/backend_bucket_circular.c
@@ -475,6 +475,9 @@
 	struct state_backend_storage_bucket_circular *circ;
 	int ret;
 
+	if (writesize < 8)
+		writesize = 8;
+
 	circ = xzalloc(sizeof(*circ));
 	circ->eraseblock = eraseblock;
 	circ->writesize = writesize;