diff --git a/src/lib/subs/aircombat.c b/src/lib/subs/aircombat.c
index 11616ee9..106b7977 100644
--- a/src/lib/subs/aircombat.c
+++ b/src/lib/subs/aircombat.c
@@ -770,12 +770,18 @@ ac_doflak(struct emp_qelem *list, struct sctstr *from)
 
     gun = MIN(FLAK_GUN_MAX, from->sct_item[I_GUN]);
     shell = from->sct_item[I_SHELL];
+#if 0
+    /*
+     * FIXME can supply from itself, causing seqno mismatch oops
+     * further down
+     */
     if (gun > shell * 2) {
 	shell += supply_commod(from->sct_own, from->sct_x, from->sct_y,
 			       I_SHELL, (gun + 1) / 2 - shell);
 	from->sct_item[I_SHELL] = shell;
 	putsect(from);
     }
+#endif
     if (gun > shell * 2)
 	gun = shell * 2;
 
diff --git a/src/lib/subs/shpsub.c b/src/lib/subs/shpsub.c
index 7ceebb7a..bcdd5869 100644
--- a/src/lib/subs/shpsub.c
+++ b/src/lib/subs/shpsub.c
@@ -867,12 +867,18 @@ shp_missile_defense(coord dx, coord dy, natid bombown, int hardtarget)
 	shell = ship.shp_item[I_SHELL];
 	if (ship.shp_item[I_MILIT] < 1)	/* do we have mil? */
 	    continue;
+#if 0
+	/*
+	 * FIXME can supply from itself, causing seqno mismatch oops
+	 * further down
+	 */
 	if (shell < 2) {	/* do we need shells */
 	    shell += supply_commod(ship.shp_own, ship.shp_x, ship.shp_y,
 				   I_SHELL, 2);
 	    if (shell < 2)
 		continue;
 	}
+#endif
 	if (ship.shp_item[I_GUN] < 1)	/* we need at least 1 gun */
 	    continue;