diff --git a/src/boot/efi/measure.h b/src/boot/efi/measure.h
index 057f4a44d6..af1cc62cdd 100644
--- a/src/boot/efi/measure.h
+++ b/src/boot/efi/measure.h
@@ -5,10 +5,10 @@
 #include <stdbool.h>
 #include <uchar.h>
 
-/* This TPM PCR is where we extend the kernel command line and any passed credentials here. */
+/* This TPM PCR is where sd-stub extends the kernel command line and any passed credentials into. */
 #define TPM_PCR_INDEX_KERNEL_PARAMETERS 12U
 
-/* We used to write the kernel command line/credentials into PCR 8, in systemd <= 250. Let's provide for
+/* sd-stub used to write the kernel command line/credentials into PCR 8, in systemd <= 250. Let's provide for
  * some compatibility. (Remove in 2023!) */
 #if EFI_TPM_PCR_COMPAT
 #define TPM_PCR_INDEX_KERNEL_PARAMETERS_COMPAT 8U