diff --git a/connect/Garden_gate/gard_gate.arc b/connect/Garden_gate/gard_gate.arc
index 5b97b14b4..788b9dcc0 100644
--- a/connect/Garden_gate/gard_gate.arc
+++ b/connect/Garden_gate/gard_gate.arc
@@ -19,7 +19,6 @@ editable 16
 visibility 100
 ac 1
 wc 0
-pass_thru 1
 magicmap black
 end
 Object ggate_closed
@@ -44,6 +43,5 @@ visibility 100
 ac 1
 wc 3
 no_pass 1
-pass_thru 1
 magicmap black
 end
diff --git a/connect/Gates/grate.arc b/connect/Gates/grate.arc
index 09df5cb55..22d9ef6ed 100644
--- a/connect/Gates/grate.arc
+++ b/connect/Gates/grate.arc
@@ -47,7 +47,6 @@ wc 7
 maxsp 0
 dam 5
 ac 1
-pass_thru 1
 editable 16
 visibility 50
 magicmap black
@@ -101,7 +100,6 @@ wc 7
 ac 1
 dam 5
 maxsp 0
-pass_thru 1
 editable 16
 visibility 50
 magicmap black
diff --git a/connect/Gates/spike.arc b/connect/Gates/spike.arc
index c138423d4..fc1c88a36 100644
--- a/connect/Gates/spike.arc
+++ b/connect/Gates/spike.arc
@@ -85,7 +85,6 @@ wc 8
 maxsp 0
 dam 256
 ac 1
-pass_thru 1
 editable 16
 visibility 50
 magicmap black
diff --git a/connect/Gates/spikes.arc b/connect/Gates/spikes.arc
index b6092d560..32d2b4734 100644
--- a/connect/Gates/spikes.arc
+++ b/connect/Gates/spikes.arc
@@ -78,7 +78,6 @@ wc 8
 maxsp 0
 dam 8
 ac 1
-pass_thru 1
 editable 16
 visibility 50
 magicmap black
diff --git a/door/wooddoor_1.arc b/door/wooddoor_1.arc
index 4057c7d1b..1eaae4484 100644
--- a/door/wooddoor_1.arc
+++ b/door/wooddoor_1.arc
@@ -12,6 +12,5 @@ material 2
 no_pick 1
 alive 1
 level 1
-pass_thru 1
 editable 16
 end
diff --git a/door/wooddoor_2.arc b/door/wooddoor_2.arc
index 600da2db8..37f4cced6 100644
--- a/door/wooddoor_2.arc
+++ b/door/wooddoor_2.arc
@@ -12,6 +12,5 @@ material 2
 no_pick 1
 alive 1
 level 1
-pass_thru 1
 editable 16
 end
diff --git a/monster/undead/ghost.arc b/monster/undead/ghost.arc
index ba417975d..0c9bd964e 100644
--- a/monster/undead/ghost.arc
+++ b/monster/undead/ghost.arc
@@ -27,7 +27,6 @@ resist_cold 50
 resist_fear 100
 resist_blind 30
 undead 1
-can_pass_thru 1
 can_see_in_dark 1
 editable 1
 one_hit 1
diff --git a/monster/undead/wraith.arc b/monster/undead/wraith.arc
index fe4a4e9a9..b7bee904e 100644
--- a/monster/undead/wraith.arc
+++ b/monster/undead/wraith.arc
@@ -30,7 +30,6 @@ resist_fear 100
 resist_blind 60
 undead 1
 can_see_in_dark 1
-can_pass_thru 1
 editable 1
 color_fg black
 one_hit 1
diff --git a/wall/bwall/earthwall.arc b/wall/bwall/earthwall.arc
index 7033233eb..2f6307948 100644
--- a/wall/bwall/earthwall.arc
+++ b/wall/bwall/earthwall.arc
@@ -22,12 +22,10 @@ resist_cold 100
 resist_confusion 100
 resist_acid 100
 resist_drain 100
-
 no_pick 1
 no_pass 1
 blocksview 1
 alive 1
 level 1
-pass_thru 1
 editable 768
 end
diff --git a/wall/bwall/hedge.arc b/wall/bwall/hedge.arc
index 534682aeb..9b7b63c34 100644
--- a/wall/bwall/hedge.arc
+++ b/wall/bwall/hedge.arc
@@ -19,13 +19,10 @@ resist_cold 100
 resist_confusion 100
 resist_acid 100
 resist_drain 100
-
 resist_fire 30
-
 no_pick 1
 blocksview 1
 alive 1
 level 1
-pass_thru 1
 editable 768
 end