diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2455d6b69..d54dcb31b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,8 +9,8 @@
   - Rohstoffe koennen jetzt bereits gesehen werden, wenn eine Einheit nur
   die Haelfte des zum Abbau noetigen Talentes hat (statt bisher
   Talent-1)
-  - Materialkosten von Mauern der Ewigkeit und Störe Astrale Integrität
-  steigen mit der Stude des Zaubers [2651]
+  - Mauern der Ewigkeit und Störe Astrale Integrität brauchen keine
+  Stufenangabe, ihre Kosten sind nicht variabel [2651]
 
 # 3.25
 
diff --git a/res/e3a/spells.xml b/res/e3a/spells.xml
index 76391c4dd..64172390f 100644
--- a/res/e3a/spells.xml
+++ b/res/e3a/spells.xml
@@ -595,9 +595,9 @@
   <spell name="shockwave" rank="5" variable="true" combat="2">
     <resource name="aura" amount="1" cost="level"/>
   </spell>
-  <spell name="eternal_walls" rank="5" parameters="b" ship="true" variable="true">
-    <resource name="aura" amount="50" cost="level"/>
-    <resource name="permaura" amount="1" cost="level"/>
+  <spell name="eternal_walls" rank="5" parameters="b" ship="true">
+    <resource name="aura" amount="50" cost="fixed"/>
+    <resource name="permaura" amount="1" cost="fixed"/>
   </spell>
   <!-- end common spells -->
 
diff --git a/res/eressea/spells.xml b/res/eressea/spells.xml
index d9a84273d..0570fa80d 100644
--- a/res/eressea/spells.xml
+++ b/res/eressea/spells.xml
@@ -214,8 +214,8 @@
   <spell name="view_reality" rank="5">
     <resource name="aura" amount="40" cost="fixed"/>
   </spell>
-  <spell name="astral_disruption" rank="4" variable="true">
-    <resource name="aura" amount="140" cost="level"/>
+  <spell name="astral_disruption" rank="4">
+    <resource name="aura" amount="140" cost="fixed"/>
   </spell>
   <spell name="seduction" rank="5" parameters="u" los="true">
     <resource name="aura" amount="12" cost="fixed"/>
@@ -422,9 +422,9 @@
     <resource name="aura" amount="1" cost="fixed"/>
     <resource name="permaura" amount="1" cost="fixed"/>
   </spell>
-  <spell name="eternal_walls" rank="5" parameters="b" ship="true" variable="true">
-    <resource name="aura" amount="50" cost="level"/>
-    <resource name="permaura" amount="1" cost="level"/>
+  <spell name="eternal_walls" rank="5" parameters="b" ship="true">
+    <resource name="aura" amount="50" cost="fixed"/>
+    <resource name="permaura" amount="1" cost="fixed"/>
   </spell>
   <spell name="puttorest" rank="5" variable="true">
     <resource name="aura" amount="3" cost="level"/>