diff --git a/at45db.c b/at45db.c
index 463442c..acde996 100644
--- a/at45db.c
+++ b/at45db.c
@@ -241,7 +241,7 @@
 
 	/* We have to split this up into chunks to fit within the programmer's read size limit, but those
 	 * chunks can cross page boundaries. */
-	const unsigned int max_data_read = flash->mst->spi.max_data_read;
+	const unsigned int max_data_read = flash->mst.spi->max_data_read;
 	const unsigned int max_chunk = (max_data_read > 0) ? max_data_read : page_size;
 	while (len > 0) {
 		unsigned int chunk = min(max_chunk, len);
@@ -272,7 +272,7 @@
 
 	/* We have to split this up into chunks to fit within the programmer's read size limit, but those
 	 * chunks can cross page boundaries. */
-	const unsigned int max_data_read = flash->mst->spi.max_data_read;
+	const unsigned int max_data_read = flash->mst.spi->max_data_read;
 	const unsigned int max_chunk = (max_data_read > 0) ? max_data_read : page_size;
 	while (len > 0) {
 		const unsigned int addr_at45 = at45db_convert_addr(addr, page_size);
@@ -463,7 +463,7 @@
 	}
 
 	/* Create a suitable buffer to store opcode, address and data chunks for buffer1. */
-	const unsigned int max_data_write = flash->mst->spi.max_data_write;
+	const unsigned int max_data_write = flash->mst.spi->max_data_write;
 	const unsigned int max_chunk = max_data_write > 4 && max_data_write - 4 <= page_size ?
 				       max_data_write - 4 : page_size;
 	uint8_t buf[4 + max_chunk];