diff --git a/src/am_map.c b/src/am_map.c
index ee915f43d..5f05f929d 100644
--- a/src/am_map.c
+++ b/src/am_map.c
@@ -1867,7 +1867,7 @@ static void AM_DrawThings(void)
                 }
                 else
                 {
-                    angle = R_InterpolateAngle(thing->oldangle, thing->angle, fractionaltic);
+                    angle = R_InterpolateAngle(thing->oldangle, thing->angle);
                     point.x = (thing->oldx + FixedMul(thing->x - thing->oldx, fractionaltic)) >> FRACTOMAPBITS;
                     point.y = (thing->oldy + FixedMul(thing->y - thing->oldy, fractionaltic)) >> FRACTOMAPBITS;
                 }
diff --git a/src/p_mobj.c b/src/p_mobj.c
index e7bdb6b3d..84ba557c4 100644
--- a/src/p_mobj.c
+++ b/src/p_mobj.c
@@ -428,7 +428,9 @@ static void P_ZMovement(mobj_t *mo)
 
         if (flags & MF_MISSILE)
         {
-            if (ceilingline && ceilingline->backsector && ceilingline->backsector->ceilingpic == skyflatnum
+            if (ceilingline
+                && ceilingline->backsector
+                && ceilingline->backsector->ceilingpic == skyflatnum
                 && mo->z > ceilingline->backsector->ceilingheight)
                 P_RemoveMobj(mo);                       // don't explode on skies
             else
diff --git a/src/r_main.c b/src/r_main.c
index 067e02a5e..f56da9002 100644
--- a/src/r_main.c
+++ b/src/r_main.c
@@ -245,7 +245,7 @@ angle_t R_PointToAngleEx2(fixed_t x1, fixed_t y1, fixed_t x, fixed_t y)
 }
 
 // [AM] Interpolate between two angles.
-angle_t R_InterpolateAngle(angle_t oangle, angle_t nangle, fixed_t scale)
+angle_t R_InterpolateAngle(angle_t oangle, angle_t nangle)
 {
     if (nangle == oangle)
         return nangle;
@@ -253,16 +253,16 @@ angle_t R_InterpolateAngle(angle_t oangle, angle_t nangle, fixed_t scale)
     if (nangle > oangle)
     {
         if (nangle - oangle < ANG270)
-            return (oangle + (angle_t)((nangle - oangle) * FIXED2DOUBLE(scale)));
+            return (oangle + (angle_t)((nangle - oangle) * FIXED2DOUBLE(fractionaltic)));
         else
-            return (oangle - (angle_t)((oangle - nangle) * FIXED2DOUBLE(scale)));   // Wrapped around
+            return (oangle - (angle_t)((oangle - nangle) * FIXED2DOUBLE(fractionaltic)));
     }
     else
     {
         if (oangle - nangle < ANG270)
-            return (oangle - (angle_t)((oangle - nangle) * FIXED2DOUBLE(scale)));
+            return (oangle - (angle_t)((oangle - nangle) * FIXED2DOUBLE(fractionaltic)));
         else
-            return (oangle + (angle_t)((nangle - oangle) * FIXED2DOUBLE(scale)));   // Wrapped around
+            return (oangle + (angle_t)((nangle - oangle) * FIXED2DOUBLE(fractionaltic)));
     }
 }
 
@@ -1039,7 +1039,7 @@ static void R_SetupFrame(void)
         viewx = mo->oldx + FixedMul(mo->x - mo->oldx, fractionaltic);
         viewy = mo->oldy + FixedMul(mo->y - mo->oldy, fractionaltic);
         viewz = viewplayer->oldviewz + FixedMul(viewplayer->viewz - viewplayer->oldviewz, fractionaltic);
-        viewangle = R_InterpolateAngle(mo->oldangle, mo->angle, fractionaltic);
+        viewangle = R_InterpolateAngle(mo->oldangle, mo->angle);
 
         if (canfreelook)
             pitch = (viewplayer->oldlookdir + (int)((viewplayer->lookdir - viewplayer->oldlookdir)
diff --git a/src/r_main.h b/src/r_main.h
index cab514740..3b40d6d94 100644
--- a/src/r_main.h
+++ b/src/r_main.h
@@ -137,7 +137,7 @@ angle_t R_PointToAngle(fixed_t x, fixed_t y);
 angle_t R_PointToAngle2(fixed_t x1, fixed_t y1, fixed_t x, fixed_t y);
 angle_t R_PointToAngleEx(fixed_t x, fixed_t y);
 angle_t R_PointToAngleEx2(fixed_t x1, fixed_t y1, fixed_t x, fixed_t y);
-angle_t R_InterpolateAngle(angle_t oangle, angle_t nangle, fixed_t scale);
+angle_t R_InterpolateAngle(angle_t oangle, angle_t nangle);
 subsector_t *R_PointInSubsector(fixed_t x, fixed_t y);
 
 //