diff --git a/data/core/units/dwarves/Berserker.cfg b/data/core/units/dwarves/Berserker.cfg
index 2e92086d325..72dabd7f1ac 100644
--- a/data/core/units/dwarves/Berserker.cfg
+++ b/data/core/units/dwarves/Berserker.cfg
@@ -147,7 +147,7 @@
         [if]
             [filter_second_attack]
             [/filter_second_attack]
-            swing=1
+            second_value=1
             ### all units with any melee attack (because the dwarf's attack is melee) will pass the above filter, and execute this block instead of the following block
 
             start_time=-240
@@ -159,7 +159,7 @@
             start_time=-3640
             offset=0.0~0.0:3400,0.0~-0.15:20,-0.15~0.1:30,0.1~0.5:190,0.5~0.6:30,0.6~0.6:30,0.6~0.15:100,0.15~0.0:30
 
-            swing=1
+            second_value=1
             [frame]
                 duration=200
                 image="units/dwarves/berserker.png"
diff --git a/data/core/units/dwarves/Ulfserker.cfg b/data/core/units/dwarves/Ulfserker.cfg
index 010bedfbda9..baaf70f3429 100644
--- a/data/core/units/dwarves/Ulfserker.cfg
+++ b/data/core/units/dwarves/Ulfserker.cfg
@@ -112,7 +112,7 @@
         [if]
             [filter_second_attack]
             [/filter_second_attack]
-            swing=1
+            second_value=1
             ### all units with any melee attack (because the dwarf's attack is melee) will pass the above filter, and execute this block instead of the following block
 
             start_time=-240
@@ -124,7 +124,7 @@
             start_time=-3640
             offset=0.0~0.0:3400,0.0~-0.15:20,-0.15~0.1:30,0.1~0.5:190,0.5~0.6:30,0.6~0.6:30,0.6~0.15:100,0.15~0.0:30
 
-            swing=1
+            second_value=1
             [frame]
                 duration=200
                 image="units/dwarves/ulfserker.png"
diff --git a/data/tools/wmllint b/data/tools/wmllint
index e2efafe9ba7..c49e39b477b 100755
--- a/data/tools/wmllint
+++ b/data/tools/wmllint
@@ -456,7 +456,8 @@ linechanges = (
         ("WEAPON_SPECIAL_STONE", "WEAPON_SPECIAL_PETRIFY"),
         ("SPECIAL_NOTE_STONE", "SPECIAL_NOTE_PETRIFY"),
         (".stoned", ".petrified"),
-        # Changed just before 1.7.3
+        # Changed at rev 37390
+        ("swing=", "second_value="),
         )
 
 def validate_stack(stack, filename, lineno):