diff --git a/src/common/gamecode/laws.c b/src/common/gamecode/laws.c
index 1d41c9df6..08cce2e11 100644
--- a/src/common/gamecode/laws.c
+++ b/src/common/gamecode/laws.c
@@ -2886,6 +2886,7 @@ age_building(building * b)
     region * rt = r_standard_to_astral(r);
     unit * u, * mage = NULL;
 
+    if (fval(rt->terrain, FORBIDDEN_REGION)) rt = NULL;
     /* step 1: give unicorns to people in the building,
      * find out if there's a magician in there. */
     for (u=r->units;u;u=u->next) {
diff --git a/src/common/kernel/teleport.c b/src/common/kernel/teleport.c
index d588c5dd4..93443212e 100644
--- a/src/common/kernel/teleport.c
+++ b/src/common/kernel/teleport.c
@@ -92,14 +92,8 @@ astralregions(const region * r, boolean (*valid)(const region *))
 region *
 r_standard_to_astral(const region *r)
 {
-  region *r2;
-
   if (rplane(r) != get_normalplane()) return NULL;
-
-  r2 = tpregion(r);
-  if (r2==NULL || fval(r2->terrain, FORBIDDEN_REGION)) return NULL;
-
-  return r2;
+  return tpregion(r);
 }
 
 region *
diff --git a/src/common/spells/spells.c b/src/common/spells/spells.c
index 4a60ea90c..74b586fab 100644
--- a/src/common/spells/spells.c
+++ b/src/common/spells/spells.c
@@ -1752,7 +1752,7 @@ sp_treewalkenter(castorder *co)
   }
 
   rt = r_standard_to_astral(r);
-  if (rt==NULL || is_cursed(rt->attribs, C_ASTRALBLOCK, 0)) {
+  if (rt==NULL || is_cursed(rt->attribs, C_ASTRALBLOCK, 0) || fval(rt->terrain, FORBIDDEN_REGION)) {
     ADDMSG(&mage->faction->msgs, msg_feedback(mage, co->order, "spellfail_astralblock", ""));
     return 0;
   }
@@ -3396,7 +3396,7 @@ sp_chaossuction(castorder *co)
 
   rt  = r_standard_to_astral(r);
 
-  if (rt==NULL) {
+  if (rt==NULL || fval(rt->terrain, FORBIDDEN_REGION)) {
     /* Hier gibt es keine Verbindung zur astralen Welt.*/
     cmistake(mage, co->order, 216, MSG_MAGIC);
     return 0;
@@ -5338,7 +5338,7 @@ sp_enterastral(castorder *co)
     return 0;
   }
 
-  if (!rt) {
+  if (!rt || fval(rt->terrain, FORBIDDEN_REGION)) {
     ADDMSG(&mage->faction->msgs, msg_feedback(mage, co->order, "feedback_no_astralregion", ""));
     return 0;
   }
@@ -5775,7 +5775,7 @@ sp_showastral(castorder *co)
   switch(getplaneid(r)) {
   case 0:
     rt = r_standard_to_astral(r);
-    if (!rt) {
+    if (!rt || fval(rt->terrain, FORBIDDEN_REGION)) {
       /* Hier gibt es keine Verbindung zur astralen Welt */
       cmistake(mage, co->order, 216, MSG_MAGIC);
       return 0;
@@ -5905,7 +5905,7 @@ sp_disruptastral(castorder *co)
   switch(getplaneid(r)) {
   case 0:
     rt = r_standard_to_astral(r);
-    if (!rt) {
+    if (!rt || fval(rt->terrain, FORBIDDEN_REGION)) {
       /* "Hier gibt es keine Verbindung zur astralen Welt." */
       cmistake(mage, co->order, 216, MSG_MAGIC);
       return 0;