diff --git a/src/common/kernel/build.c b/src/common/kernel/build.c
index b7e73b481..30dceb7e4 100644
--- a/src/common/kernel/build.c
+++ b/src/common/kernel/build.c
@@ -1159,7 +1159,7 @@ entership(unit * u, ship * sh, struct order * ord, boolean lasttry)
       getshipweight(sh, &sweight, &scabins);
       sweight += weight(u);
       scabins += u->number;
-      sweight = (sweight/100) * 100; /* Silberreste abrunden */
+      sweight = ((sweight+99) / 100) * 100; /* Silberreste aufrunden */
 
       if (sweight > mweight || scabins > mcabins) {
         if (lasttry) cmistake(u, ord, 34, MSG_MOVE);
diff --git a/src/common/kernel/movement.c b/src/common/kernel/movement.c
index 67514daf2..fa9983882 100644
--- a/src/common/kernel/movement.c
+++ b/src/common/kernel/movement.c
@@ -433,7 +433,7 @@ cansail(const region * r, ship * sh)
 	if (sh->type->construction && sh->size!=sh->type->construction->maxsize)
 	  return false;
 	getshipweight(sh, &n, &p);
-  n = (n/100) * 100; /* Silberreste abrunden */
+  n = ((n+99)/100) * 100; /* Silberreste aufrunden */
 
   if( is_cursed(sh->attribs, C_SHIP_FLYING, 0) ) {
 		if (sh->type->cargo>500*100)
diff --git a/src/common/kernel/race.c b/src/common/kernel/race.c
index e777d733d..3178ccc95 100644
--- a/src/common/kernel/race.c
+++ b/src/common/kernel/race.c
@@ -368,7 +368,6 @@ oldfamiliars(unit * familiar)
 			set_level(familiar, SK_MAGIC, 1);
 			set_level(familiar, SK_MINING, 1);
 			set_level(familiar, SK_LUMBERJACK, 1);
-			set_level(familiar, SK_ROAD_BUILDING, 1);
 			set_level(familiar, SK_AUSDAUER, 1);
 			m = create_mage(familiar, M_GRAU);
 			break;
diff --git a/src/common/kernel/spell.c b/src/common/kernel/spell.c
index e7c370bfb..f1c434103 100644
--- a/src/common/kernel/spell.c
+++ b/src/common/kernel/spell.c
@@ -2278,6 +2278,11 @@ sp_ironkeeper(castorder *co)
 	unit *mage = (unit *)co->magician;
 	int cast_level = co->level;
 
+  if (rterrain(r) != T_MOUNTAIN && rterrain(r) != T_GLACIER) {
+    report_failure(mage, co->order);
+    return 0;
+  }
+
 	keeper = create_unit(r, mage->faction, 1, new_race[RC_IRONKEEPER], 0, "Bergwächter", mage);
 
 	/*keeper->age = cast_level + 2;*/