diff --git a/subiquity/common/filesystem/boot.py b/subiquity/common/filesystem/boot.py
index 9aa9fbd8..5cb2bcf8 100644
--- a/subiquity/common/filesystem/boot.py
+++ b/subiquity/common/filesystem/boot.py
@@ -154,8 +154,9 @@ def get_boot_device_plan_bios(device) -> Optional[MakeBootDevicePlan]:
     if device.ptable == 'msdos':
         return attr_plan
     pgs = gaps.parts_and_gaps(device)
-    if isinstance(pgs[0], Partition) and pgs[0].flag == "bios_grub":
-        return attr_plan
+    if len(pgs) > 0:
+        if isinstance(pgs[0], Partition) and pgs[0].flag == "bios_grub":
+            return attr_plan
 
     gap = gaps.Gap(device=device,
                    offset=sizes.BIOS_GRUB_SIZE_BYTES,
diff --git a/subiquity/common/filesystem/tests/test_manipulator.py b/subiquity/common/filesystem/tests/test_manipulator.py
index 7ca13371..79554ba9 100644
--- a/subiquity/common/filesystem/tests/test_manipulator.py
+++ b/subiquity/common/filesystem/tests/test_manipulator.py
@@ -457,6 +457,14 @@ class TestFilesystemManipulator(unittest.TestCase):
             preserve=True)
         self.assertFalse(boot.can_be_boot_device(disk))
 
+    @parameterized.expand([(1,), (2,)])
+    def test_no_add_boot_BIOS_gpt_teeny_disk(self, version):
+        # Showed up in VM testing - the ISO created cloud-localds shows up as a
+        # potential install target, and weird things happen.
+        manipulator = make_manipulator(Bootloader.BIOS, version)
+        disk = make_disk(manipulator.model, ptable='gpt', size=1 << 20)
+        self.assertFalse(boot.can_be_boot_device(disk))
+
     @parameterized.expand([(1,), (2,)])
     def test_add_boot_BIOS_msdos(self, version):
         manipulator = make_manipulator(Bootloader.BIOS, version)