diff --git a/files/image_config/kdump/kdump-tools b/files/image_config/kdump/kdump-tools
index 61a41eb319..83c2766524 100644
--- a/files/image_config/kdump/kdump-tools
+++ b/files/image_config/kdump/kdump-tools
@@ -10,7 +10,7 @@ KDUMP_CMDLINE_APPEND="irqpoll nr_cpus=1 nousb systemd.unit=kdump-tools.service a
 # Disable advanced pcie features
 # Disable high precision event timer as on some platforms it is interfering with the kdump operation
 # Pass platform identifier string as part of crash kernel command line to be used by the reboot script during kdump
-KDUMP_CMDLINE_APPEND+=" panic=10 debug hpet=disable pcie_port=compat pci=nommconf sonic_platform=__PLATFORM__"
+KDUMP_CMDLINE_APPEND="${KDUMP_CMDLINE_APPEND} panic=10 debug hpet=disable pcie_port=compat pci=nommconf sonic_platform=__PLATFORM__"
 
 # Use SONiC reboot wrapper script present in /usr/local/bin post kdump
 PATH=/usr/local/bin:$PATH