diff --git a/extras/conf/SRB2Kart2.cfg b/extras/conf/SRB2Kart2.cfg
index c3a49b6b6..57e095c97 100644
--- a/extras/conf/SRB2Kart2.cfg
+++ b/extras/conf/SRB2Kart2.cfg
@@ -2518,9 +2518,11 @@ linedeftypes
 			title = "Slope Frontside Floor";
 			prefix = "(700)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Not dynamic";
+			flags4096text = "[12] Dynamic";
+			flags32768text = "[15] Copy to other side";
 			slope = "regular";
 			slopeargs = 1;
+			copyslopeargs = 1;
 		}
 
 		701
@@ -2528,9 +2530,11 @@ linedeftypes
 			title = "Slope Frontside Ceiling";
 			prefix = "(701)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Not dynamic";
+			flags4096text = "[12] Dynamic";
+			flags32768text = "[15] Copy to other side";
 			slope = "regular";
 			slopeargs = 2;
+			copyslopeargs = 4;
 		}
 
 		702
@@ -2538,9 +2542,11 @@ linedeftypes
 			title = "Slope Frontside Floor and Ceiling";
 			prefix = "(702)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Not dynamic";
+			flags4096text = "[12] Dynamic";
+			flags32768text = "[15] Copy to other side";
 			slope = "regular";
 			slopeargs = 3;
+			copyslopeargs = 5;
 		}
 
 		703
@@ -2548,9 +2554,11 @@ linedeftypes
 			title = "Slope Frontside Floor and Backside Ceiling";
 			prefix = "(703)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Not dynamic";
+			flags4096text = "[12] Dynamic";
+			flags32768text = "[15] Copy to other side";
 			slope = "regular";
 			slopeargs = 9;
+			copyslopeargs = 8;
 		}
 
 		704
@@ -2580,9 +2588,11 @@ linedeftypes
 			title = "Slope Backside Floor";
 			prefix = "(710)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Not dynamic";
+			flags4096text = "[12] Dynamic";
+			flags32768text = "[15] Copy to other side";
 			slope = "regular";
 			slopeargs = 4;
+			copyslopeargs = 2;
 		}
 
 		711
@@ -2590,9 +2600,11 @@ linedeftypes
 			title = "Slope Backside Ceiling";
 			prefix = "(711)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Not dynamic";
+			flags4096text = "[12] Dynamic";
+			flags32768text = "[15] Copy to other side";
 			slope = "regular";
 			slopeargs = 8;
+			copyslopeargs = 8;
 		}
 
 		712
@@ -2600,9 +2612,11 @@ linedeftypes
 			title = "Slope Backside Floor and Ceiling";
 			prefix = "(712)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Not dynamic";
+			flags4096text = "[12] Dynamic";
+			flags32768text = "[15] Copy to other side";
 			slope = "regular";
 			slopeargs = 12;
+			copyslopeargs = 10;
 		}
 
 		713
@@ -2610,9 +2624,11 @@ linedeftypes
 			title = "Slope Backside Floor and Frontside Ceiling";
 			prefix = "(713)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Not dynamic";
+			flags4096text = "[12] Dynamic";
+			flags32768text = "[15] Copy to other side";
 			slope = "regular";
 			slopeargs = 6;
+			copyslopeargs = 6;
 		}
 
 		714
diff --git a/src/p_setup.c b/src/p_setup.c
index cbaa962f1..4cda5de6f 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -3317,6 +3317,12 @@ static void P_ConvertBinaryMap(void)
 			if (lines[i].flags & ML_NONET)
 				lines[i].args[2] |= TMSL_DYNAMIC;
 
+			if (lines[i].flags & ML_TFERLINE)
+			{
+					lines[i].args[4] |= backfloor ? TMSC_BACKTOFRONTFLOOR : (frontfloor ? TMSC_FRONTTOBACKFLOOR : 0);
+					lines[i].args[4] |= backceil ? TMSC_BACKTOFRONTCEILING : (frontceil ? TMSC_FRONTTOBACKCEILING : 0);
+			}
+
 			lines[i].special = 700;
 			break;
 		}
diff --git a/src/p_slopes.c b/src/p_slopes.c
index 885987597..8df582851 100644
--- a/src/p_slopes.c
+++ b/src/p_slopes.c
@@ -758,6 +758,9 @@ void P_SpawnSlopes(const boolean fromsave) {
 	for (i = 0; i < numlines; i++)
 		switch (lines[i].special)
 		{
+			case 700:
+				if (lines[i].flags & ML_TFERLINE) P_CopySectorSlope(&lines[i]);
+				break;
 			case 720:
 				P_CopySectorSlope(&lines[i]);
 			default: