diff --git a/diskimage_builder/elements/bootloader/finalise.d/50-bootloader b/diskimage_builder/elements/bootloader/finalise.d/50-bootloader
index 26b861b8..88de8d89 100755
--- a/diskimage_builder/elements/bootloader/finalise.d/50-bootloader
+++ b/diskimage_builder/elements/bootloader/finalise.d/50-bootloader
@@ -150,6 +150,9 @@ function install_grub2 {
             case $ARCH in
                 "x86_64"|"amd64")
                     GRUB_OPTS="--target=x86_64-efi"
+                    # This call installs grub for BIOS compatability
+                    # which makes portable EFI/BIOS images.
+                    $GRUBNAME --modules="$modules" --target=i386-pc $BOOT_DEV
                     ;;
                 # At this point, we don't need to override the target
                 # for any other architectures.
diff --git a/diskimage_builder/elements/bootloader/pkg-map b/diskimage_builder/elements/bootloader/pkg-map
index 5b34f155..e2e933d8 100644
--- a/diskimage_builder/elements/bootloader/pkg-map
+++ b/diskimage_builder/elements/bootloader/pkg-map
@@ -4,7 +4,7 @@
       "8": {
         "extlinux": "syslinux-extlinux",
         "grub-pc": "grub2-tools grub2",
-        "grub-efi-amd64": "grub2-tools grub2-efi-x64 grub2-efi-x64-modules",
+        "grub-efi-amd64": "grub2-tools grub2-pc grub2-efi-x64 grub2-efi-x64-modules",
         "grub-efi-arm64": "grub2-tools grub2-efi-aa64 grub2-efi-aa64-modules",
         "grub-efi-aarch64": "grub2-tools grub2-efi-aa64 grub2-efi-aa64-modules",
         "grub-efi": "grub2-tools grub2-efi",
@@ -29,7 +29,7 @@
     "redhat": {
       "extlinux": "syslinux-extlinux",
       "grub-pc": "grub2-tools grub2",
-      "grub-efi-amd64": "grub2-tools grub2-efi-x64 grub2-efi-x64-modules",
+      "grub-efi-amd64": "grub2-tools grub2-pc grub2-efi-x64 grub2-efi-x64-modules",
       "grub-efi-arm64": "grub2-tools grub2-efi-aa64 grub2-efi-aa64-modules",
       "grub-efi-aarch64": "grub2-tools grub2-efi-aa64 grub2-efi-aa64-modules",
       "grub-efi": "grub2-tools grub2-efi",
@@ -40,7 +40,7 @@
     "dkms_package": "dkms",
     "extlinux": "extlinux",
     "grub-pc": "grub-pc",
-    "grub-efi-amd64": "grub-efi",
+    "grub-efi-amd64": "grub-efi grub-pc-bin",
     "grub-efi-arm64": "grub-efi-arm64",
     "grub-ppc64": "grub-ieee1275"
   }
diff --git a/releasenotes/notes/efi-bios-images-052283eabba98b90.yaml b/releasenotes/notes/efi-bios-images-052283eabba98b90.yaml
new file mode 100644
index 00000000..c1ac11bc
--- /dev/null
+++ b/releasenotes/notes/efi-bios-images-052283eabba98b90.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    The ``bootloader`` element now co-installs a BIOS bootloader for
+    x86-64 when ``DIB_BLOCK_DEVICE=efi`` is set.  This makes images
+    that are EFI and BIOS cross-compatiable.