diff --git a/src/r_main.c b/src/r_main.c
index ae89afbe..3ca5a02e 100644
--- a/src/r_main.c
+++ b/src/r_main.c
@@ -295,7 +295,7 @@ static void R_InitTextureMapping (void)
         ;
       xtoviewangle[x] = (i<<ANGLETOFINESHIFT)-ANG90;
       // [FG] linear horizontal sky scrolling
-      linearskyangle[x] = ((viewwidth/2-x)*((video.unscaledw<<6)/viewwidth))*(ANG90/(NONWIDEWIDTH<<6));
+      linearskyangle[x] = ((viewwidth/2-x)*((video.unscaledw<<FRACBITS)/viewwidth))*(ANG90/(NONWIDEWIDTH<<FRACBITS));
     }
     
   // Take out the fencepost cases from viewangletox.