diff --git a/src/state.c b/src/state.c
index c8fbc59..63f561f 100644
--- a/src/state.c
+++ b/src/state.c
@@ -1067,7 +1067,8 @@
 	if (!ret) {
 		if (!size)
 			size = meminfo.size;
-		backend_raw->need_erase = 1;
+		if (!(meminfo.flags & MTD_NO_ERASE))
+			backend_raw->need_erase = 1;
 		backend_raw->step = ALIGN(backend_raw->size_full, meminfo.erasesize);
 		if (verbose)
 			fprintf(stderr, "%s is a mtd of size %d, adjust stepsize to %ld\n",