diff --git a/src/flash/nor/nrf51.c b/src/flash/nor/nrf51.c
index a41bc0598..e3f6c10ef 100644
--- a/src/flash/nor/nrf51.c
+++ b/src/flash/nor/nrf51.c
@@ -690,14 +690,15 @@ static int nrf51_probe(struct flash_bank *bank)
 
 		/* Note the register name is misleading,
 		 * NRF51_FICR_CODESIZE is the number of pages in flash memory, not the number of bytes! */
-		res = target_read_u32(chip->target, NRF51_FICR_CODESIZE,
-				(uint32_t *) &bank->num_sectors);
+		uint32_t num_sectors;
+		res = target_read_u32(chip->target, NRF51_FICR_CODESIZE, &num_sectors);
 		if (res != ERROR_OK) {
 			LOG_ERROR("Couldn't read code memory size");
 			return res;
 		}
 
-		bank->size = bank->num_sectors * chip->code_page_size;
+		bank->num_sectors = num_sectors;
+		bank->size = num_sectors * chip->code_page_size;
 
 		if (spec && bank->size / 1024 != spec->flash_size_kb)
 			LOG_WARNING("Chip's reported Flash capacity does not match expected one");