diff --git a/extras/conf/SRB2Kart2.cfg b/extras/conf/SRB2Kart2.cfg
index b731736ef..97db26fc2 100644
--- a/extras/conf/SRB2Kart2.cfg
+++ b/extras/conf/SRB2Kart2.cfg
@@ -2519,11 +2519,9 @@ linedeftypes
 			title = "Slope Frontside Floor";
 			prefix = "(700)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Dynamic";
-			flags32768text = "[15] Copy to other side";
+			flags4096text = "[12] Not dynamic";
 			slope = "regular";
 			slopeargs = 1;
-			copyslopeargs = 1;
 		}
 
 		701
@@ -2531,11 +2529,9 @@ linedeftypes
 			title = "Slope Frontside Ceiling";
 			prefix = "(701)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Dynamic";
-			flags32768text = "[15] Copy to other side";
+			flags4096text = "[12] Not dynamic";
 			slope = "regular";
 			slopeargs = 2;
-			copyslopeargs = 4;
 		}
 
 		702
@@ -2543,11 +2539,9 @@ linedeftypes
 			title = "Slope Frontside Floor and Ceiling";
 			prefix = "(702)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Dynamic";
-			flags32768text = "[15] Copy to other side";
+			flags4096text = "[12] Not dynamic";
 			slope = "regular";
 			slopeargs = 3;
-			copyslopeargs = 5;
 		}
 
 		703
@@ -2555,11 +2549,9 @@ linedeftypes
 			title = "Slope Frontside Floor and Backside Ceiling";
 			prefix = "(703)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Dynamic";
-			flags32768text = "[15] Copy to other side";
+			flags4096text = "[12] Not dynamic";
 			slope = "regular";
 			slopeargs = 9;
-			copyslopeargs = 8;
 		}
 
 		704
@@ -2589,11 +2581,9 @@ linedeftypes
 			title = "Slope Backside Floor";
 			prefix = "(710)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Dynamic";
-			flags32768text = "[15] Copy to other side";
+			flags4096text = "[12] Not dynamic";
 			slope = "regular";
 			slopeargs = 4;
-			copyslopeargs = 2;
 		}
 
 		711
@@ -2601,11 +2591,9 @@ linedeftypes
 			title = "Slope Backside Ceiling";
 			prefix = "(711)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Dynamic";
-			flags32768text = "[15] Copy to other side";
+			flags4096text = "[12] Not dynamic";
 			slope = "regular";
 			slopeargs = 8;
-			copyslopeargs = 8;
 		}
 
 		712
@@ -2613,11 +2601,9 @@ linedeftypes
 			title = "Slope Backside Floor and Ceiling";
 			prefix = "(712)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Dynamic";
-			flags32768text = "[15] Copy to other side";
+			flags4096text = "[12] Not dynamic";
 			slope = "regular";
 			slopeargs = 12;
-			copyslopeargs = 10;
 		}
 
 		713
@@ -2625,11 +2611,9 @@ linedeftypes
 			title = "Slope Backside Floor and Frontside Ceiling";
 			prefix = "(713)";
 			flags2048text = "[11] No physics";
-			flags4096text = "[12] Dynamic";
-			flags32768text = "[15] Copy to other side";
+			flags4096text = "[12] Not dynamic";
 			slope = "regular";
 			slopeargs = 6;
-			copyslopeargs = 6;
 		}
 
 		714
diff --git a/src/p_setup.c b/src/p_setup.c
index 80315bb2e..9894523a5 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -3327,12 +3327,6 @@ 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 4ec387058..b35316e6d 100644
--- a/src/p_slopes.c
+++ b/src/p_slopes.c
@@ -758,9 +758,6 @@ 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: