diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index aad7076ae020..d5dcc74a625e 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -1409,6 +1409,8 @@ spi_nor_find_best_erase_type(const struct spi_nor_erase_map *map,
 			continue;
 
 		erase = &map->erase_type[i];
+		if (!erase->size)
+			continue;
 
 		/* Alignment is not mandatory for overlaid regions */
 		if (region->offset & SNOR_OVERLAID_REGION &&