diff --git a/drivers/eeprom/eeprom_emulator.c b/drivers/eeprom/eeprom_emulator.c
index 0672e83f839f0e..4e5f3e92540307 100644
--- a/drivers/eeprom/eeprom_emulator.c
+++ b/drivers/eeprom/eeprom_emulator.c
@@ -733,7 +733,7 @@ static const struct eeprom_driver_api eeprom_emu_api = {
 		(DT_GPARENT(part)), (DT_PARENT(part))), write_block_size)
 
 #define PART_CBS(part, size) (PART_WBS(part) < 4) ? \
-	((size > (2^16)) ? 8 : 4) : PART_WBS(part)
+	((size > KB(64)) ? 8 : 4) : PART_WBS(part)
 
 #define PART_DEV_ID(part) \
 	COND_CODE_1(DT_NODE_HAS_COMPAT(DT_GPARENT(part), soc_nv_flash), \