diff --git a/manifests/smlight/smlight_slzb07Mg24_zigbee_ncp.yaml b/manifests/smlight/smlight_slzb07Mg24_zigbee_ncp.yaml
index e586d4d5..ea5dec19 100644
--- a/manifests/smlight/smlight_slzb07Mg24_zigbee_ncp.yaml
+++ b/manifests/smlight/smlight_slzb07Mg24_zigbee_ncp.yaml
@@ -37,9 +37,9 @@ c_defines:
 
   SL_IOSTREAM_USART_VCOM_RX_BUFFER_SIZE: 128
 
-  SL_CLOCK_MANAGER_HFXO_EN: 1
-  SL_CLOCK_MANAGER_HFXO_CTUNE: 140
-  SL_CLOCK_MANAGER_DEFAULT_HF_CLOCK_SOURCE: SL_CLOCK_MANAGER_DEFAULT_HF_CLOCK_SOURCE_HFXO
+  # SL_CLOCK_MANAGER_HFXO_EN: 1
+  # SL_CLOCK_MANAGER_HFXO_CTUNE: 140
+  # SL_CLOCK_MANAGER_DEFAULT_HF_CLOCK_SOURCE: SL_CLOCK_MANAGER_DEFAULT_HF_CLOCK_SOURCE_HFXO
 
   SL_ZIGBEE_APS_UNICAST_MESSAGE_COUNT: 128
   SL_ZIGBEE_BROADCAST_TABLE_SIZE: 30