diff --git a/extras/conf/udb/Includes/SRB222_linedefs.cfg b/extras/conf/udb/Includes/SRB222_linedefs.cfg
index 513325225..b534f52de 100644
--- a/extras/conf/udb/Includes/SRB222_linedefs.cfg
+++ b/extras/conf/udb/Includes/SRB222_linedefs.cfg
@@ -1739,6 +1739,57 @@ udmf
 		}
 	}
 
+	linedefexecpoly
+	{
+		title = "Linedef Executor (polyobject)";
+
+		480
+		{
+			title = "Door Slide";
+			prefix = "(480)";
+			arg0
+			{
+				title = "PolyObject ID";
+				type = 14;
+			}
+			arg1
+			{
+				title = "Speed";
+			}
+			arg2
+			{
+				title = "Distance";
+			}
+			arg3
+			{
+				title = "Return delay";
+			}
+		}
+		481
+		{
+			title = "Door Swing";
+			prefix = "(481)";
+			arg0
+			{
+				title = "PolyObject ID";
+				type = 14;
+			}
+			arg1
+			{
+				title = "Speed";
+			}
+			arg2
+			{
+				title = "Angle";
+				type = 8;
+			}
+			arg3
+			{
+				title = "Return delay";
+			}
+		}
+
+
 	light
 	{
 		606
diff --git a/src/p_setup.c b/src/p_setup.c
index 4ff9e6117..f814f0948 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -2917,6 +2917,13 @@ static void P_ConvertBinaryMap(void)
 		case 456: //Stop fading colormap
 			lines[i].args[0] = lines[i].tag;
 			break;
+		case 480: // PolyObject: Door slide
+		case 481: // PolyObject: Door swing
+			lines[i].args[0] = lines[i].tag;
+			lines[i].args[1] = sides[lines[i].sidenum[0]].textureoffset >> FRACBITS;
+			lines[i].args[2] = sides[lines[i].sidenum[0]].rowoffset >> FRACBITS;
+			lines[i].args[3] = (lines[i].sidenum[1] == 0xffff) ? 0 : (sides[lines[i].sidenum[1]].textureoffset >> FRACBITS);
+			break;
 		case 606: //Colormap
 			lines[i].args[0] = lines[i].tag;
 			break;
diff --git a/src/p_spec.c b/src/p_spec.c
index e54a1d694..59821b684 100644
--- a/src/p_spec.c
+++ b/src/p_spec.c
@@ -1079,33 +1079,25 @@ static boolean PolyDoor(line_t *line)
 {
 	polydoordata_t pdd;
 
-	pdd.polyObjNum = line->tag; // polyobject id
+	pdd.polyObjNum = line->args[0]; // polyobject id
 
 	switch(line->special)
 	{
 		case 480: // Polyobj_DoorSlide
 			pdd.doorType = POLY_DOOR_SLIDE;
-			pdd.speed    = sides[line->sidenum[0]].textureoffset / 8;
+			pdd.speed    = line->args[1] << (FRACBITS - 3);
 			pdd.angle    = R_PointToAngle2(line->v1->x, line->v1->y, line->v2->x, line->v2->y); // angle of motion
-			pdd.distance = sides[line->sidenum[0]].rowoffset;
-
-			if (line->sidenum[1] != 0xffff)
-				pdd.delay = sides[line->sidenum[1]].textureoffset >> FRACBITS; // delay in tics
-			else
-				pdd.delay = 0;
+			pdd.distance = line->args[2] << FRACBITS;
+			pdd.delay    = line->args[3]; // delay in tics
 			break;
 		case 481: // Polyobj_DoorSwing
 			pdd.doorType = POLY_DOOR_SWING;
-			pdd.speed    = sides[line->sidenum[0]].textureoffset >> FRACBITS; // angular speed
-			pdd.distance = sides[line->sidenum[0]].rowoffset >> FRACBITS; // angular distance
-
-			if (line->sidenum[1] != 0xffff)
-				pdd.delay = sides[line->sidenum[1]].textureoffset >> FRACBITS; // delay in tics
-			else
-				pdd.delay = 0;
+			pdd.speed    = line->args[1]; // angular speed
+			pdd.distance = line->args[2]; // angular distance
+			pdd.delay    = line->args[3]; // delay in tics
 			break;
 		default:
-			return 0; // ???
+			return false; // ???
 	}
 
 	return EV_DoPolyDoor(&pdd);