diff --git a/data/units/Blood_Bat.cfg b/data/units/Blood_Bat.cfg
index 601756ea0a1..6568b17c856 100644
--- a/data/units/Blood_Bat.cfg
+++ b/data/units/Blood_Bat.cfg
@@ -2,6 +2,7 @@
 name=Blood Bat
 race=undead
 image=undead-bloodbat.png
+image_defensive=undead-bloodbat-defend.png
 hitpoints=26
 movement_type=undeadfly
 movement=9
diff --git a/data/units/Vampire_Bat.cfg b/data/units/Vampire_Bat.cfg
index 2e73f6288c1..84ae27479c8 100644
--- a/data/units/Vampire_Bat.cfg
+++ b/data/units/Vampire_Bat.cfg
@@ -2,6 +2,7 @@
 name=Vampire Bat
 race=undead
 image=undead-bat.png
+image_defensive=undead-bat-defend.png
 hitpoints=16
 movement_type=undeadfly
 movement=8
diff --git a/images/undead-bat-defend.png b/images/undead-bat-defend.png
new file mode 100644
index 00000000000..af08fce4ab6
Binary files /dev/null and b/images/undead-bat-defend.png differ
diff --git a/images/undead-bloodbat-defend.png b/images/undead-bloodbat-defend.png
new file mode 100644
index 00000000000..27aeb7b9148
Binary files /dev/null and b/images/undead-bloodbat-defend.png differ