diff --git a/kdumpctl b/kdumpctl
index 03d3fd4..cb20708 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -1643,6 +1643,7 @@ reset_crashkernel()
 
 		_old_crashkernel=$(get_grub_kernel_boot_parameter "$_kernel" crashkernel)
 		_old_fadump_val=$(get_grub_kernel_boot_parameter "$_kernel" fadump)
+		[[ "$_new_fadump_val" == off ]] && _new_fadump_val=""
 		if [[ $_old_crashkernel != "$_new_crashkernel" || $_old_fadump_val != "$_new_fadump_val" ]]; then
 			_update_kernel_cmdline "$_kernel" "$_new_crashkernel" "$_new_dump_mode" "$_new_fadump_val"
 			if [[ $_reboot != yes ]]; then