diff --git a/system/event_apply.arc b/system/event_apply.arc
index e06913080..be899af48 100644
--- a/system/event_apply.arc
+++ b/system/event_apply.arc
@@ -2,4 +2,5 @@ Object event_apply
 type 116
 subtype 1
 invisible 1
+no_drop 1
 end
diff --git a/system/event_attack.arc b/system/event_attack.arc
index 34318f223..5bf9e962c 100644
--- a/system/event_attack.arc
+++ b/system/event_attack.arc
@@ -2,4 +2,5 @@ Object event_attack
 type 116
 subtype 2
 invisible 1
+no_drop 1
 end
diff --git a/system/event_close.arc b/system/event_close.arc
index 09f474616..1e45ee1ce 100644
--- a/system/event_close.arc
+++ b/system/event_close.arc
@@ -2,4 +2,5 @@ Object event_close
 type 116
 subtype 11
 invisible 1
+no_drop 1
 end
diff --git a/system/event_death.arc b/system/event_death.arc
index 4cab2a7be..4be085ff5 100644
--- a/system/event_death.arc
+++ b/system/event_death.arc
@@ -2,4 +2,5 @@ Object event_death
 type 116
 subtype 3
 invisible 1
+no_drop 1
 end
diff --git a/system/event_destroy.arc b/system/event_destroy.arc
index becda57f8..f4a9f8b1a 100644
--- a/system/event_destroy.arc
+++ b/system/event_destroy.arc
@@ -2,4 +2,5 @@ Object event_destroy
 type 116
 subtype 13
 invisible 1
+no_drop 1
 end
diff --git a/system/event_drop.arc b/system/event_drop.arc
index e208a8b34..d1580f3f9 100644
--- a/system/event_drop.arc
+++ b/system/event_drop.arc
@@ -2,4 +2,5 @@ Object event_drop
 type 116
 subtype 4
 invisible 1
+no_drop 1
 end
diff --git a/system/event_pickup.arc b/system/event_pickup.arc
index ba125dfb2..a4f5172e8 100644
--- a/system/event_pickup.arc
+++ b/system/event_pickup.arc
@@ -2,4 +2,5 @@ Object event_pickup
 type 116
 subtype 5
 invisible 1
+no_drop 1
 end
diff --git a/system/event_say.arc b/system/event_say.arc
index c7e7d075a..a98bf59bf 100644
--- a/system/event_say.arc
+++ b/system/event_say.arc
@@ -2,4 +2,5 @@ Object event_say
 type 116
 subtype 6
 invisible 1
+no_drop 1
 end
diff --git a/system/event_selling.arc b/system/event_selling.arc
index 315335aa7..ee7e77bf4 100644
--- a/system/event_selling.arc
+++ b/system/event_selling.arc
@@ -2,4 +2,5 @@ Object event_selling
 type 116
 subtype 32
 invisible 1
+no_drop 1
 end
diff --git a/system/event_stop.arc b/system/event_stop.arc
index a6893acee..1dc1caf91 100644
--- a/system/event_stop.arc
+++ b/system/event_stop.arc
@@ -2,4 +2,5 @@ Object event_stop
 type 116
 subtype 7
 invisible 1
+no_drop 1
 end
diff --git a/system/event_throw.arc b/system/event_throw.arc
index 5134742fb..7d8d4da5f 100644
--- a/system/event_throw.arc
+++ b/system/event_throw.arc
@@ -2,4 +2,5 @@ Object event_throw
 type 116
 subtype 9
 invisible 1
+no_drop 1
 end
diff --git a/system/event_time.arc b/system/event_time.arc
index b4771d2fb..1d2896e41 100644
--- a/system/event_time.arc
+++ b/system/event_time.arc
@@ -2,4 +2,5 @@ Object event_time
 type 116
 subtype 8
 invisible 1
+no_drop 1
 end
diff --git a/system/event_timer.arc b/system/event_timer.arc
index 569f345be..da1375d3f 100644
--- a/system/event_timer.arc
+++ b/system/event_timer.arc
@@ -2,4 +2,5 @@ Object event_timer
 type 116
 subtype 12
 invisible 1
+no_drop 1
 end
diff --git a/system/event_trigger.arc b/system/event_trigger.arc
index 316ac50b3..6451144d1 100644
--- a/system/event_trigger.arc
+++ b/system/event_trigger.arc
@@ -2,4 +2,5 @@ Object event_trigger
 type 116
 subtype 10
 invisible 1
+no_drop 1
 end
diff --git a/system/event_user.arc b/system/event_user.arc
index 07fd3e332..937b79ba5 100644
--- a/system/event_user.arc
+++ b/system/event_user.arc
@@ -2,4 +2,5 @@ Object event_user
 type 116
 subtype 31
 invisible 1
+no_drop 1
 end