diff --git a/Examples/MAX32657/Bluetooth/BLE5_ctr/project.mk b/Examples/MAX32657/Bluetooth/BLE5_ctr/project.mk
index ae3ea6ef72..f1de6ad0dd 100644
--- a/Examples/MAX32657/Bluetooth/BLE5_ctr/project.mk
+++ b/Examples/MAX32657/Bluetooth/BLE5_ctr/project.mk
@@ -28,7 +28,7 @@
 LIB_CORDIO = 1
 
 CORDIO_DIR = $(LIBS_DIR)/Packetcraft-ADI
-LIB_PHY_DIR = $(LIBS_DIR)/RF-PHY
+LIB_PHY_DIR ?= $(LIBS_DIR)/RF-PHY
 
 # Cordio library options
 BLE_HOST = 0