diff --git a/docs/schemas/domain.rng b/docs/schemas/domain.rng
index 6cbace07e1..1cb77bba11 100644
--- a/docs/schemas/domain.rng
+++ b/docs/schemas/domain.rng
@@ -302,32 +302,32 @@
 
       <!-- All the memory/swap related tunables would go in the memtune -->
       <optional>
-	<element name="memtune">
-	  <!-- Maximum memory the VM can use -->
-	  <optional>
-	    <element name="hard_limit">
-	      <ref name="memoryKB"/>
-	    </element>
-	  </optional>
-	  <!-- Minimum memory ascertained for the VM during contention -->
-	  <optional>
-	    <element name="soft_limit">
-	      <ref name="memoryKB"/>
-	    </element>
-	  </optional>
-	  <!-- Minimum amount of memory required to start the VM -->
-	  <optional>
-	    <element name="min_guarantee">
-	      <ref name="memoryKB"/>
-	    </element>
-	  </optional>
-	  <!-- Maximum swap area the VM can use -->
-	  <optional>
-	    <element name="swap_hard_limit">
-	      <ref name="memoryKB"/>
-	    </element>
-	  </optional>
-	</element>
+        <element name="memtune">
+          <!-- Maximum memory the VM can use -->
+          <optional>
+            <element name="hard_limit">
+              <ref name="memoryKB"/>
+            </element>
+          </optional>
+          <!-- Minimum memory ascertained for the VM during contention -->
+          <optional>
+            <element name="soft_limit">
+              <ref name="memoryKB"/>
+            </element>
+          </optional>
+          <!-- Minimum amount of memory required to start the VM -->
+          <optional>
+            <element name="min_guarantee">
+              <ref name="memoryKB"/>
+            </element>
+          </optional>
+          <!-- Maximum swap area the VM can use -->
+          <optional>
+            <element name="swap_hard_limit">
+              <ref name="memoryKB"/>
+            </element>
+          </optional>
+        </element>
       </optional>
 
       <optional>