diff --git a/src/teleport.c b/src/teleport.c
index 0e47f9735..cb8bb4f40 100644
--- a/src/teleport.c
+++ b/src/teleport.c
@@ -1191,10 +1191,10 @@ struct monst *mtmp;
            sent out of his room (caller might resort to goodpos() if
            we report failure here, so this isn't full prevention) */
         if (mtmp->isshk && inhishop(mtmp)) {
-            if (levl[x][y].roomno != ESHK(mtmp)->shoproom)
+            if (levl[x][y].roomno != (unsigned char) ESHK(mtmp)->shoproom)
                 return FALSE;
         } else if (mtmp->ispriest && inhistemple(mtmp)) {
-            if (levl[x][y].roomno != EPRI(mtmp)->shroom)
+            if (levl[x][y].roomno !=  (unsigned char) EPRI(mtmp)->shroom)
                 return FALSE;
         }
         /* current location is <xx,yy> */