diff --git a/source/games/duke/src/actors.cpp b/source/games/duke/src/actors.cpp
index 95cc57852..329ff1335 100644
--- a/source/games/duke/src/actors.cpp
+++ b/source/games/duke/src/actors.cpp
@@ -727,7 +727,7 @@ void handle_se00(DDukeActor* actor)
 			if (sect->floorz > actor->spr.pos.Z) //z's are touching
 			{
 				sect->addfloorz(-2);
-				zchange =  2;
+				zchange =  -2;
 				if (sect->floorz < actor->spr.pos.Z)
 					sect->setfloorz(actor->spr.pos.Z);
 			}
diff --git a/source/games/duke/src/spawn.cpp b/source/games/duke/src/spawn.cpp
index 85cf13e12..178ff8041 100644
--- a/source/games/duke/src/spawn.cpp
+++ b/source/games/duke/src/spawn.cpp
@@ -863,6 +863,7 @@ void spawneffector(DDukeActor* actor, TArray<DDukeActor*>* actors)
 		case SE_15_SLIDING_DOOR:
 		case SE_16_REACTOR:
 		case SE_26:
+			if(actor->spr.lotag == SE_0_ROTATING_SECTOR) StartInterpolation(actor->sector(), Interp_Sect_Floorz);
 			setsectinterpolate(actor->sector());
 			break;