diff --git a/config/fxdata/rules.cfg b/config/fxdata/rules.cfg
index 3f5c0b087..847dd6c17 100644
--- a/config/fxdata/rules.cfg
+++ b/config/fxdata/rules.cfg
@@ -35,7 +35,7 @@ DungeonHeartHealTime = 8
 DungeonHeartHealHealth = 1
 HeroDoorWaitTime = 200
 ; Possible Classic Bugs: RESURRECT_FOREVER OVERFLOW_8BIT CLAIM_ROOM_ALL_THINGS RESURRECT_REMOVED NO_HAND_PURGE_ON_DEFEAT MUST_OBEY_KEEPS_NOT_DO_JOBS PASSIVE_NEUTRALS BREAK_NEUTRAL_WALLS
-PreserveClassicBugs = 
+PreserveClassicBugs = PASSIVE_NEUTRALS
 
 [computer]
 AutoDigLimit = 10
diff --git a/version.mk b/version.mk
index d25be634c..bbf813491 100644
--- a/version.mk
+++ b/version.mk
@@ -1,5 +1,5 @@
 VER_MAJOR=0
 VER_MINOR=4
 VER_RELEASE=6
-VER_BUILD=1896
+VER_BUILD=1901
 PACKAGE_SUFFIX=unofficial