diff --git a/patchwork.md b/patchwork.md
index aead31369..40372bb64 100644
--- a/patchwork.md
+++ b/patchwork.md
@@ -619,3 +619,9 @@ b90611b4b4c176ec1c80df002cc4ac36aa0c4dc8
 Preserve registration order of upgrades
 ```
 Again, a huge diff because of code style changes.
+
+```
+8494ba8ce29cd8d7b9105eef497fe3fe3f89d350
+
+Improve UX when a resource mount cannot be found
+```
diff --git a/src/main/java/dan200/computercraft/api/ComputerCraftAPI.java b/src/main/java/dan200/computercraft/api/ComputerCraftAPI.java
index 7a7de9cb7..4868de353 100644
--- a/src/main/java/dan200/computercraft/api/ComputerCraftAPI.java
+++ b/src/main/java/dan200/computercraft/api/ComputerCraftAPI.java
@@ -108,7 +108,10 @@ public final class ComputerCraftAPI {
      * Use in conjunction with {@link IComputerAccess#mount} or {@link IComputerAccess#mountWritable} to mount a resource folder onto a computer's file
      * system.
      *
-     * The files in this mount will be a combination of files in all mod jar, and data packs that contain resources with the same domain and path.
+     * The files in this mount will be a combination of files in all mod jar, and data packs that contain
+     * resources with the same domain and path. For instance, ComputerCraft's resources are stored in
+     * "/data/computercraft/lua/rom". We construct a mount for that with
+     * {@code createResourceMount("computercraft", "lua/rom")}.
      *
      * @param domain The domain under which to look for resources. eg: "mymod".
      * @param subPath The subPath under which to look for resources. eg: "lua/myfiles".
diff --git a/src/main/java/dan200/computercraft/core/filesystem/ResourceMount.java b/src/main/java/dan200/computercraft/core/filesystem/ResourceMount.java
index a9f2b243c..e767525b6 100644
--- a/src/main/java/dan200/computercraft/core/filesystem/ResourceMount.java
+++ b/src/main/java/dan200/computercraft/core/filesystem/ResourceMount.java
@@ -90,19 +90,30 @@ public final class ResourceMount implements IMount {
 
     private void load() {
         boolean hasAny = false;
-        FileEntry newRoot = new FileEntry(new Identifier(this.namespace, this.subPath));
-        for (Identifier file : this.manager.findResources(this.subPath, s -> true)) {
-            if (!file.getNamespace()
-                     .equals(this.namespace)) {
-                continue;
-            }
+        String existingNamespace = null;
+
+        FileEntry newRoot = new FileEntry( new Identifier( namespace, subPath ) );
+        for( Identifier file : manager.findResources( subPath, s -> true ) )
+        {
+            existingNamespace = file.getNamespace();
+
+            if( !file.getNamespace().equals( namespace ) ) continue;
 
             String localPath = FileSystem.toLocal(file.getPath(), this.subPath);
             this.create(newRoot, localPath);
             hasAny = true;
         }
 
-        this.root = hasAny ? newRoot : null;
+        root = hasAny ? newRoot : null;
+
+        if( !hasAny )
+        {
+            ComputerCraft.log.warn("Cannot find any files under /data/{}/{} for resource mount.", namespace, subPath);
+            if( newRoot != null )
+            {
+                ComputerCraft.log.warn("There are files under /data/{}/{} though. Did you get the wrong namespace?", existingNamespace, subPath);
+            }
+        }
     }
 
     private void create(FileEntry lastEntry, String path) {