diff --git a/src/artifact.c b/src/artifact.c
index ce628966c..b0d3d610e 100644
--- a/src/artifact.c
+++ b/src/artifact.c
@@ -212,7 +212,7 @@ register boolean mod;
 	if (otmp && *name)
 	    for (a = artilist+1; a->otyp; a++)
 		if (a->otyp == otmp->otyp && !strcmp(a->name, name)) {
-		    register int m = a - artilist;
+		    register int m = (int)(a - artilist);
 		    otmp->oartifact = (char)(mod ? m : 0);
 		    otmp->age = 0;
 		    if(otmp->otyp == RIN_INCREASE_DAMAGE)
diff --git a/src/end.c b/src/end.c
index e6d02c0ac..382a0eb1d 100644
--- a/src/end.c
+++ b/src/end.c
@@ -327,7 +327,7 @@ char *defquery;
     char *dop = index(disclosure_options, category);
 
     if (dop && defquery) {
-	idx = dop - disclosure_options;
+	idx = (int)(dop - disclosure_options);
 	if (idx < 0 || idx > (NUM_DISCLOSURE_OPTIONS - 1)) {
 	    impossible(
 		   "should_query_disclose_option: bad disclosure index %d %c",
diff --git a/src/mklev.c b/src/mklev.c
index ad2553f7d..a363c4295 100644
--- a/src/mklev.c
+++ b/src/mklev.c
@@ -957,7 +957,7 @@ topologize(croom)
 register struct mkroom *croom;
 #endif
 {
-	register int x, y, roomno = (croom - rooms) + ROOMOFFSET;
+	register int x, y, roomno = (int)((croom - rooms) + ROOMOFFSET);
 	register int lowx = croom->lx, lowy = croom->ly;
 	register int hix = croom->hx, hiy = croom->hy;
 #ifdef SPECIALIZATION
diff --git a/src/mkmaze.c b/src/mkmaze.c
index 24497f3e3..e35ec97dd 100644
--- a/src/mkmaze.c
+++ b/src/mkmaze.c
@@ -534,7 +534,7 @@ register const char *s;
 	    char *ep = getenv("SPLEVTYPE");	/* not nh_getenv */
 	    if (ep) {
 		/* rindex always succeeds due to code in prior block */
-		int len = (rindex(protofile, '-') - protofile) + 1;
+		int len = (int)((rindex(protofile, '-') - protofile) + 1);
 
 		while (ep && *ep) {
 		    if (!strncmp(ep, protofile, len)) {
diff --git a/src/mkroom.c b/src/mkroom.c
index 0d17f0a6d..8cbbe4f84 100644
--- a/src/mkroom.c
+++ b/src/mkroom.c
@@ -227,7 +227,7 @@ struct mkroom *sroom;
 	struct monst *mon;
 	register int sx,sy,i;
 	int sh, tx, ty, goldlim, type = sroom->rtype;
-	int rmno = (sroom - rooms) + ROOMOFFSET;
+	int rmno = (int)((sroom - rooms) + ROOMOFFSET);
 	coord mm;
 
 #ifdef GCC_WARN
@@ -518,7 +518,7 @@ mktemple()
 	 * In temples, shrines are blessed altars
 	 * located in the center of the room
 	 */
-	shrine_spot = shrine_pos((sroom - rooms) + ROOMOFFSET);
+	shrine_spot = shrine_pos((int)((sroom - rooms) + ROOMOFFSET));
 	lev = &levl[shrine_spot->x][shrine_spot->y];
 	lev->typ = ALTAR;
 	lev->altarmask = induced_align(80);
@@ -596,7 +596,7 @@ coord *c;
 	int i;
 
 	if (croom->irregular) {
-	    i = (croom - rooms) + ROOMOFFSET;
+	    i = (int)((croom - rooms) + ROOMOFFSET);
 
 	    while(try_cnt++ < 100) {
 		c->x = somex(croom);
diff --git a/src/mon.c b/src/mon.c
index e4d1b1261..0dc07c45e 100644
--- a/src/mon.c
+++ b/src/mon.c
@@ -2500,9 +2500,9 @@ struct monst *mon;
 		struct obj *m_armr = which_armor(mon, W_ARM);
 
 		if (m_armr && Is_dragon_scales(m_armr))
-		    mndx = Dragon_scales_to_pm(m_armr) - mons;
+		    mndx = (int)(Dragon_scales_to_pm(m_armr) - mons);
 		else if (m_armr && Is_dragon_mail(m_armr))
-		    mndx = Dragon_mail_to_pm(m_armr) - mons;
+		    mndx = (int)(Dragon_mail_to_pm(m_armr) - mons);
 	      }
 		break;
 	}
diff --git a/src/options.c b/src/options.c
index d6358723e..cddb16faf 100644
--- a/src/options.c
+++ b/src/options.c
@@ -702,7 +702,7 @@ char *tp;
 	    cp++;
 	    if (*cp == 'x' || *cp == 'X')
 		for (++cp; (dp = index(hex, *cp)) && (dcount++ < 2); cp++)
-		    cval = (cval * 16) + (dp - hex) / 2;
+		    cval = (int)((cval * 16) + (dp - hex) / 2);
 	    else if (*cp == 'o' || *cp == 'O')
 		for (++cp; (index("01234567",*cp)) && (dcount++ < 3); cp++)
 		    cval = (cval * 8) + (*cp - '0');
@@ -1933,7 +1933,7 @@ goodfruit:
 			if (c == 'k') c = 'v';	/* killed -> vanquished */
 			dop = index(disclosure_options, c);
 			if (dop) {
-				idx = dop - disclosure_options;
+				idx = (int)(dop - disclosure_options);
 				if (idx < 0 || idx > NUM_DISCLOSURE_OPTIONS - 1) {
 				    impossible("bad disclosure index %d %c",
 							idx, c);
@@ -2538,7 +2538,7 @@ map_menu_cmd(ch)
 {
     char *found = index(mapped_menu_cmds, ch);
     if (found) {
-	int idx = found - mapped_menu_cmds;
+	int idx = (int)(found - mapped_menu_cmds);
 	ch = mapped_menu_op[idx];
     }
     return ch;
diff --git a/src/priest.c b/src/priest.c
index ee43c80e0..f791b01e0 100644
--- a/src/priest.c
+++ b/src/priest.c
@@ -223,7 +223,7 @@ boolean sanctum;   /* is it the seat of the high priest? */
 	priest = makemon(&mons[sanctum ? PM_HIGH_PRIEST : PM_ALIGNED_PRIEST],
 			 sx + 1, sy, MM_EPRI);
 	if (priest) {
-		EPRI(priest)->shroom = (sroom - rooms) + ROOMOFFSET;
+		EPRI(priest)->shroom = (schar)((sroom - rooms) + ROOMOFFSET);
 		EPRI(priest)->shralign = Amask2align(levl[sx][sy].altarmask);
 		EPRI(priest)->shrpos.x = sx;
 		EPRI(priest)->shrpos.y = sy;
diff --git a/src/shknam.c b/src/shknam.c
index 87e9b77ff..e41ff1acb 100644
--- a/src/shknam.c
+++ b/src/shknam.c
@@ -370,7 +370,7 @@ int sx, sy;
 		mtmp->mappearance = STRANGE_OBJECT;
 	    }
 	} else {
-	    atype = get_shop_item(shp - shtypes);
+	    atype = get_shop_item((int)(shp - shtypes));
 	    if (atype == VEGETARIAN_CLASS)
 		mkveggy_at(sx, sy);
 	    else if (atype < 0)
@@ -486,7 +486,7 @@ struct mkroom	*sroom;
 
 	/* check that the shopkeeper placement is sane */
 	if(sroom->irregular) {
-	    int rmno = (sroom - rooms) + ROOMOFFSET;
+	    int rmno = (int)((sroom - rooms) + ROOMOFFSET);
 	    if (isok(sx-1,sy) && !levl[sx-1][sy].edge &&
 		(int) levl[sx-1][sy].roomno == rmno) sx--;
 	    else if (isok(sx+1,sy) && !levl[sx+1][sy].edge &&
@@ -534,7 +534,7 @@ struct mkroom	*sroom;
 	set_malign(shk);
 	shk->msleeping = 0;
 	shk->mtrapseen = ~0;	/* we know all the traps already */
-	ESHK(shk)->shoproom = (sroom - rooms) + ROOMOFFSET;
+	ESHK(shk)->shoproom = (schar)((sroom - rooms) + ROOMOFFSET);
 	sroom->resident = shk;
 	ESHK(shk)->shoptype = sroom->rtype;
 	assign_level(&(ESHK(shk)->shoplevel), &u.uz);
@@ -574,7 +574,7 @@ register struct mkroom *sroom;
      */
     register int sx, sy, sh;
     char buf[BUFSZ];
-    int rmno = (sroom - rooms) + ROOMOFFSET;
+    int rmno = (int)((sroom - rooms) + ROOMOFFSET);
     const struct shclass *shp = &shtypes[shp_indx];
 
     /* first, try to place a shopkeeper in the room */
diff --git a/src/sounds.c b/src/sounds.c
index cfe7a9d06..75ca7c282 100644
--- a/src/sounds.c
+++ b/src/sounds.c
@@ -224,7 +224,7 @@ dosounds()
 	    return;
 	}
 	if (tended_shop(sroom) &&
-		!index(u.ushops, ROOM_INDEX(sroom) + ROOMOFFSET)) {
+		!index(u.ushops, (int)(ROOM_INDEX(sroom) + ROOMOFFSET))) {
 	    static const char * const shop_msg[3] = {
 		    "someone cursing shoplifters.",
 		    "the chime of a cash register.",
diff --git a/src/timeout.c b/src/timeout.c
index 70d321537..cac960036 100644
--- a/src/timeout.c
+++ b/src/timeout.c
@@ -227,7 +227,7 @@ nh_timeout()
 
 	for(upp = u.uprops; upp < u.uprops+SIZE(u.uprops); upp++)
 	    if((upp->intrinsic & TIMEOUT) && !(--upp->intrinsic & TIMEOUT)) {
-		kptr = find_delayed_killer(upp - u.uprops);
+		kptr = find_delayed_killer((int)(upp - u.uprops));
 		switch(upp - u.uprops){
 		case STONED:
 			if (kptr && kptr->name[0]) {