diff --git a/src/move.c b/src/move.c
index 4cc15c9bf..1502f6243 100644
--- a/src/move.c
+++ b/src/move.c
@@ -1837,10 +1837,7 @@ static void sail(unit * u, order * ord, region_list ** routep, bool drifting)
             reason = check_ship_allowed(sh, next_point);
             if (reason < 0) {
                 /* for some reason or another, we aren't allowed in there.. */
-                if (reason == SA_NO_INSECT) {
-                    ADDMSG(&f->msgs, msg_message("detectforbidden", "unit region", u, sh->region));
-                }
-                else if (check_leuchtturm(current_point, NULL)) {
+                if (check_leuchtturm(current_point, NULL)) {
                     ADDMSG(&f->msgs, msg_message("sailnolandingstorm", "ship region", sh, next_point));
                 }
                 else {
diff --git a/src/move.h b/src/move.h
index 535c76bb2..d3a5d1e0d 100644
--- a/src/move.h
+++ b/src/move.h
@@ -90,8 +90,7 @@ extern "C" {
 
 #define SA_HARBOUR 1
 #define SA_COAST 0
-#define SA_NO_INSECT -1
-#define SA_NO_COAST -2
+#define SA_NO_COAST -1
 
     int check_ship_allowed(struct ship *sh, const struct region * r);
     direction_t drift_target(struct ship *sh);