diff --git a/etc/default/grub.d/40_cpu_mitigations.cfg b/etc/default/grub.d/40_cpu_mitigations.cfg
index 029db6d..aaefdaf 100644
--- a/etc/default/grub.d/40_cpu_mitigations.cfg
+++ b/etc/default/grub.d/40_cpu_mitigations.cfg
@@ -85,3 +85,9 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX retbleed=auto,nosmt"
 ##
 ## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/gather_data_sampling.html
 GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX gather_data_sampling=force"
+
+## Register File Data Sampling (RFDS) mitigation on Intel Atom CPUs which 
+## encompasses E-cores on hybrid architectures.
+##
+## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/reg-file-data-sampling.html
+GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX reg_file_data_sampling=on"