diff --git a/scripts/tests/e2/spells.lua b/scripts/tests/e2/spells.lua
index a9f49d2b8..6a34d98db 100644
--- a/scripts/tests/e2/spells.lua
+++ b/scripts/tests/e2/spells.lua
@@ -136,3 +136,16 @@ function test_familiar_lynx()
     assert_equal(1, u:get_skill('magic'))
     assert_equal(1, u:get_skill('perception'))
 end
+
+function test_bug_2480()
+  local r = region.create(0, 0, "plain")
+  local f = faction.create("human", "hodor@eressea.de", "de")
+  local u1 = unit.create(f, r, 1)
+  local monster = unit.create(get_monsters(), r, 1, "wyrm")
+  u1.number = 30
+  u1.hp = u1.hp_max * u1.number
+  monster:add_order("ATTACK " .. itoa36(u1.id))
+  process_orders()
+  assert_equal(0, u1.number);
+  write_reports()
+end
diff --git a/src/battle.c b/src/battle.c
index 9e2f841c0..64808747d 100644
--- a/src/battle.c
+++ b/src/battle.c
@@ -1169,7 +1169,6 @@ terminate(troop dt, troop at, int type, const char *damage, bool missile)
     }
 
     if (magic) {
-        res = frac_sub(frac_one, res);
         res = frac_mul(frac_make(da, 1), res);
         da = res.sa[0] / res.sa[1];
     }