diff --git a/src/p_spec.c b/src/p_spec.c
index b5607e2b2..e53d386cf 100644
--- a/src/p_spec.c
+++ b/src/p_spec.c
@@ -3403,7 +3403,7 @@ static void P_ProcessLineSpecial(line_t *line, mobj_t *mo, sector_t *callsec)
 			INT16 destvalue = line->sidenum[1] != 0xffff ?
 				(INT16)(sides[line->sidenum[1]].textureoffset>>FRACBITS) : (INT16)(line->dx>>FRACBITS);
 			INT16 speed = line->sidenum[1] != 0xffff ?
-				(INT16)(sides[line->sidenum[1]].rowoffset>>FRACBITS) : (INT16)(abs(line->dy)>>FRACBITS);
+				(INT16)(abs(sides[line->sidenum[1]].rowoffset>>FRACBITS)) : (INT16)(abs(line->dy)>>FRACBITS);
 			INT16 sectag = (INT16)(sides[line->sidenum[0]].textureoffset>>FRACBITS);
 			INT16 foftag = (INT16)(sides[line->sidenum[0]].rowoffset>>FRACBITS);
 			sector_t *sec; // Sector that the FOF is visible in
@@ -3433,6 +3433,11 @@ static void P_ProcessLineSpecial(line_t *line, mobj_t *mo, sector_t *callsec)
 					return;
 				}
 
+				// Prevent continuous execs from interfering on an existing fade
+				if (!(line->flags & ML_EFFECT5)
+					&& rover->fadingdata)
+					continue;
+
 				if (speed > 0)
 					P_AddFakeFloorFader(rover, secnum, j,
 						destvalue,