diff --git a/src/po_man.cpp b/src/po_man.cpp
index c6e273a0f..bb9b3ca46 100644
--- a/src/po_man.cpp
+++ b/src/po_man.cpp
@@ -676,7 +676,7 @@ void DPolyDoor::Tick ()
 		break;
 
 	case PODOOR_SWING:
-		if (poly->RotatePolyobj (m_Speed))
+		if (m_Dist <= 0 || poly->RotatePolyobj (m_Speed))
 		{
 			absSpeed = abs (m_Speed);
 			if (m_Dist == -1)