diff --git a/src/lib/commands/mfir.c b/src/lib/commands/mfir.c
index 08185a3f..be1ee2dc 100644
--- a/src/lib/commands/mfir.c
+++ b/src/lib/commands/mfir.c
@@ -149,7 +149,7 @@ multifire(void)
 	    if (item.land.lnd_own != player->cnum)
 		continue;
 
-	    if (fland.lnd_frg == 0) {
+	    if (fland.lnd_dam == 0) {
 		pr("Unit %d cannot fire!\n", fland.lnd_uid);
 		continue;
 	    }
@@ -357,7 +357,7 @@ multifire(void)
 	    fx = fland.lnd_x;
 	    fy = fland.lnd_y;
 
-	    if (fland.lnd_frg == 0) {
+	    if (fland.lnd_dam == 0) {
 		pr("Unit %d cannot fire!\n", fland.lnd_uid);
 		continue;
 	    }
diff --git a/src/lib/commands/miss.c b/src/lib/commands/miss.c
index 28161874..abf9d16f 100644
--- a/src/lib/commands/miss.c
+++ b/src/lib/commands/miss.c
@@ -227,7 +227,7 @@ mission(void)
 	    }
 
 	if ((mission == MI_INTERDICT) && (type == EF_LAND))
-	    if (lchr[(int)gp->type].l_frg < 1) {
+	    if (lchr[(int)gp->type].l_dam == 0) {
 		pr("%s: cannot fire at range!\n", obj_nameof(gp));
 		continue;
 	    }
diff --git a/src/lib/subs/lndsub.c b/src/lib/subs/lndsub.c
index e984c526..a3ba6e90 100644
--- a/src/lib/subs/lndsub.c
+++ b/src/lib/subs/lndsub.c
@@ -1136,7 +1136,7 @@ lnd_support(natid victim, natid attacker, coord x, coord y, int defending)
 
     snxtitem_all(&ni, EF_LAND);
     while (nxtitem(&ni, &land)) {
-	if (land.lnd_frg == 0)
+	if (land.lnd_dam == 0)
 	    continue;
 	if ((land.lnd_x == x) && (land.lnd_y == y))
 	    continue;
diff --git a/src/lib/subs/supply.c b/src/lib/subs/supply.c
index e1b0f988..9c56da88 100644
--- a/src/lib/subs/supply.c
+++ b/src/lib/subs/supply.c
@@ -546,7 +546,7 @@ use_supply(struct lndstr *lp)
 
     lp->lnd_item[I_SHELL] = MAX(lp->lnd_item[I_SHELL] - shells_needed, 0);
 
-    if (lp->lnd_frg)		/* artillery */
+    if (lp->lnd_dam)		/* artillery */
 	goto done;
 
     food_needed = get_minimum(lp, I_FOOD);