diff --git a/source/core/gamefuncs.cpp b/source/core/gamefuncs.cpp
index c4610c689..f5df0a4c7 100644
--- a/source/core/gamefuncs.cpp
+++ b/source/core/gamefuncs.cpp
@@ -170,9 +170,9 @@ void calcSlope(const sectortype* sec, float xpos, float ypos, float* pceilz, flo
 		int len = wal->Length();
 		if (len != 0)
 		{
-			float den = (wal->deltax() * (float(ypos - wal->y)) - wal->deltay() * (float(xpos - wal->x))) * (1.f / 8.f);
-			if (pceilz && sec->ceilingstat & CSTAT_SECTOR_SLOPE) *pceilz += (sec->ceilingheinum * den) / len;
-			if (pflorz && sec->floorstat & CSTAT_SECTOR_SLOPE) *pflorz += (sec->floorheinum * den) / len;
+			float fac = (wal->deltax() * (float(ypos - wal->y)) - wal->deltay() * (float(xpos - wal->x))) * (1.f / 256.f) / len;
+			if (pceilz && sec->ceilingstat & CSTAT_SECTOR_SLOPE) *pceilz += (sec->ceilingheinum * fac);
+			if (pflorz && sec->floorstat & CSTAT_SECTOR_SLOPE) *pflorz += (sec->floorheinum * fac);
 		}
 	}
 }
diff --git a/source/core/maploader.cpp b/source/core/maploader.cpp
index b8f48a6ff..19bc4dcd6 100644
--- a/source/core/maploader.cpp
+++ b/source/core/maploader.cpp
@@ -64,7 +64,7 @@ void walltype::calcLength()
 	lengthflags &= ~1;
 	point2Wall()->lengthflags &= ~2;
 	auto d = delta();
-	length = (int)sqrt(d.x * d.x + d.y * d.y) << 5;
+	length = (int)sqrt(d.x * d.x + d.y * d.y);
 }
 
 // needed for skipping over to get the map size first.