diff --git a/src/main/java/com/gtnewhorizons/angelica/render/EmissiveTextureAutoloader.java b/src/main/java/com/gtnewhorizons/angelica/render/EmissiveTextureAutoloader.java
index 019a23ddd..5897efd79 100644
--- a/src/main/java/com/gtnewhorizons/angelica/render/EmissiveTextureAutoloader.java
+++ b/src/main/java/com/gtnewhorizons/angelica/render/EmissiveTextureAutoloader.java
@@ -57,8 +57,8 @@ public class EmissiveTextureAutoloader {
 
         final IResourceManager resMan = Minecraft.getMinecraft().getResourceManager();
         if (resMan instanceof SimpleReloadableResourceManager simple) {
-            FallbackResourceManager fallback = simple.domainResourceManagers.get(full.getResourceDomain());
-            if (fallback != null) {
+            final Map<String, ?> domainManagers = simple.domainResourceManagers;
+            if (domainManagers.get(full.getResourceDomain()) instanceof FallbackResourceManager fallback) {
                 for (IResourcePack rp : fallback.resourcePacks) {
                     if (rp != null && rp.resourceExists(full)) {
                         return true;
diff --git a/src/main/java/com/gtnewhorizons/angelica/textures/atlas/AtlasPackPolicy.java b/src/main/java/com/gtnewhorizons/angelica/textures/atlas/AtlasPackPolicy.java
index 677a788f9..98678d6bc 100644
--- a/src/main/java/com/gtnewhorizons/angelica/textures/atlas/AtlasPackPolicy.java
+++ b/src/main/java/com/gtnewhorizons/angelica/textures/atlas/AtlasPackPolicy.java
@@ -78,7 +78,8 @@ public final class AtlasPackPolicy {
         final Trust trust = new Trust();
         final Map<String, List<IResourcePack>> eligible = new HashMap<>();
         final Map<String, List<String>> untrustedDomains = new HashMap<>();
-        for (Map.Entry<String, FallbackResourceManager> entry : manager.domainResourceManagers.entrySet()) {
+        final Map<String, ?> domainManagers = manager.domainResourceManagers;
+        for (Map.Entry<String, ?> entry : domainManagers.entrySet()) {
             final List<IResourcePack> claimChecked = eligiblePacks(entry.getKey(), entry.getValue(), trust, untrustedDomains);
             if (claimChecked != null) {
                 eligible.put(entry.getKey(), claimChecked);
@@ -88,9 +89,9 @@ public final class AtlasPackPolicy {
         return eligible;
     }
 
-    private static List<IResourcePack> eligiblePacks(String domainName, FallbackResourceManager domain, Trust trust,
+    private static List<IResourcePack> eligiblePacks(String domainName, Object domainManager, Trust trust,
         Map<String, List<String>> untrustedDomains) {
-        if (domain == null || domain.getClass() != FallbackResourceManager.class) {
+        if (!(domainManager instanceof FallbackResourceManager domain) || domain.getClass() != FallbackResourceManager.class) {
             return null;
         }
         boolean eligible = true;
diff --git a/src/main/java/com/prupe/mcpatcher/mal/resource/TexturePackAPI.java b/src/main/java/com/prupe/mcpatcher/mal/resource/TexturePackAPI.java
index 771724ab1..834f278a4 100644
--- a/src/main/java/com/prupe/mcpatcher/mal/resource/TexturePackAPI.java
+++ b/src/main/java/com/prupe/mcpatcher/mal/resource/TexturePackAPI.java
@@ -52,12 +52,10 @@ public class TexturePackAPI {
         List<IResourcePack> resourcePacks = new ArrayList<>();
         IResourceManager resourceManager = Minecraft.getMinecraft().getResourceManager();
         if (resourceManager instanceof SimpleReloadableResourceManager) {
-            @SuppressWarnings("unchecked")
-            Set<Map.Entry<String, FallbackResourceManager>> entrySet = ((SimpleReloadableResourceManager) resourceManager).domainResourceManagers
-                .entrySet();
-            for (Map.Entry<String, FallbackResourceManager> entry : entrySet) {
-                if (namespace == null || namespace.equals(entry.getKey())) {
-                    List<IResourcePack> packs = entry.getValue().resourcePacks;
+            final Map<String, ?> domainManagers = ((SimpleReloadableResourceManager) resourceManager).domainResourceManagers;
+            for (Map.Entry<String, ?> entry : domainManagers.entrySet()) {
+                if ((namespace == null || namespace.equals(entry.getKey())) && entry.getValue() instanceof FallbackResourceManager fallback) {
+                    List<IResourcePack> packs = fallback.resourcePacks;
                     if (packs != null) {
                         resourcePacks.removeAll(packs);
                         resourcePacks.addAll(packs);
diff --git a/src/test/java/com/gtnewhorizons/angelica/textures/atlas/AtlasPackPolicyTest.java b/src/test/java/com/gtnewhorizons/angelica/textures/atlas/AtlasPackPolicyTest.java
index 97dbd3f19..9d8b6ce8e 100644
--- a/src/test/java/com/gtnewhorizons/angelica/textures/atlas/AtlasPackPolicyTest.java
+++ b/src/test/java/com/gtnewhorizons/angelica/textures/atlas/AtlasPackPolicyTest.java
@@ -17,6 +17,8 @@ import java.util.Set;
 import com.gtnewhorizons.angelica.config.AngelicaConfig;
 
 import net.minecraft.client.resources.FallbackResourceManager;
+import net.minecraft.client.resources.IResource;
+import net.minecraft.client.resources.IResourceManager;
 import net.minecraft.client.resources.IResourcePack;
 import net.minecraft.client.resources.SimpleReloadableResourceManager;
 import net.minecraft.client.resources.data.IMetadataSection;
@@ -205,6 +207,41 @@ class AtlasPackPolicyTest {
         assertTrue(result.get("domainB").isEmpty());
     }
 
+    private static final class ForeignDomainManager implements IResourceManager {
+
+        @Override
+        public Set<String> getResourceDomains() {
+            return Collections.emptySet();
+        }
+
+        @Override
+        public IResource getResource(ResourceLocation location) throws IOException {
+            throw new IOException("not used");
+        }
+
+        @Override
+        public List<IResource> getAllResources(ResourceLocation location) throws IOException {
+            throw new IOException("not used");
+        }
+    }
+
+    @Test
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    void eligibleDomainsSkipsForeignDomainManager() {
+        AngelicaConfig.atlasTrustedPacks = new String[] { FakePack.class.getName() };
+
+        final IMetadataSerializer serializer = new IMetadataSerializer();
+        final SimpleReloadableResourceManager manager = new SimpleReloadableResourceManager(serializer);
+        final FallbackResourceManager domain = new FallbackResourceManager(serializer);
+        domain.resourcePacks.add(new FakePack(new ResourceLocation("tinker", "unrelated.png")));
+        manager.domainResourceManagers.put("domainD", domain);
+        ((Map) manager.domainResourceManagers).put("sound_x", new ForeignDomainManager());
+
+        final Map<String, List<IResourcePack>> result = AtlasPackPolicy.eligibleDomains(manager);
+        assertTrue(result.containsKey("domainD"));
+        assertFalse(result.containsKey("sound_x"));
+    }
+
     @Test
     void eligibleDomainsRecordsUnknownPackOnce() {
         final IMetadataSerializer serializer = new IMetadataSerializer();