diff --git a/src/p_slopes.c b/src/p_slopes.c
index d939fee98..c127001cd 100644
--- a/src/p_slopes.c
+++ b/src/p_slopes.c
@@ -281,6 +281,7 @@ void P_SpawnSlope_Line(int linenum)
 	if(frontfloor || frontceil)
 	{
 		line->frontsector->hasslope = true; // Tell the software renderer that we're sloped
+		line->frontsector->flags |= SF_TRIGGERSPECIAL_TOUCH; // you're gonna want to get specials on contact
 
 		origin.z = line->backsector->floorheight;
 		direction.x = nx;
@@ -407,6 +408,7 @@ void P_SpawnSlope_Line(int linenum)
 	if(backfloor || backceil)
 	{
 		line->backsector->hasslope = true; // Tell the software renderer that we're sloped
+		line->backsector->flags |= SF_TRIGGERSPECIAL_TOUCH; // you're gonna want to get specials on contact
 
 		origin.z = line->frontsector->floorheight;
 		// Backsector
@@ -599,6 +601,7 @@ void P_CopySectorSlope(line_t *line)
    }
 
    fsec->hasslope = true;
+   fsec->flags |= SF_TRIGGERSPECIAL_TOUCH; // you're gonna want to get specials on contact
 
    line->special = 0; // Linedef was use to set slopes, it finished its job, so now make it a normal linedef
 }
@@ -718,6 +721,7 @@ void P_ResetDynamicSlopes(void) {
 						*slopetoset = P_NewVertexSlope(lines[i].tag, lines[i].tag, lines[i].tag, flags);
 
 					sides[lines[i].sidenum[which]].sector->hasslope = true;
+					sides[lines[i].sidenum[which]].sector->flags |= SF_TRIGGERSPECIAL_TOUCH; // you're gonna want to get specials on contact
 				}
 				break;