diff --git a/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-O128/sai_sn5600_128x400g_1x25g.xml b/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-O128/sai_sn5600_128x400g_1x25g.xml
index 97656c1d5100..a380aec7dec3 100644
--- a/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-O128/sai_sn5600_128x400g_1x25g.xml
+++ b/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-O128/sai_sn5600_128x400g_1x25g.xml
@@ -21,7 +21,7 @@
         <device-mac-address>00:02:03:04:05:00</device-mac-address>
 
         <!-- ISSU enabled -->
-        <issu-enabled>1</issu-enabled>
+        <issu-enabled>0</issu-enabled>
 
         <!-- Number of ports in the following port list -->
         <number-of-physical-ports>65</number-of-physical-ports>