diff --git a/ocfl-java-core/src/main/java/edu/wisc/library/ocfl/core/extension/storage/layout/config/NTupleOmitPrefixStorageLayoutConfig.java b/ocfl-java-core/src/main/java/edu/wisc/library/ocfl/core/extension/storage/layout/config/NTupleOmitPrefixStorageLayoutConfig.java
index fe9c5c38..4957641c 100644
--- a/ocfl-java-core/src/main/java/edu/wisc/library/ocfl/core/extension/storage/layout/config/NTupleOmitPrefixStorageLayoutConfig.java
+++ b/ocfl-java-core/src/main/java/edu/wisc/library/ocfl/core/extension/storage/layout/config/NTupleOmitPrefixStorageLayoutConfig.java
@@ -26,6 +26,7 @@
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonValue;
+import edu.wisc.library.ocfl.api.exception.OcflExtensionException;
 import edu.wisc.library.ocfl.api.util.Enforce;
 import edu.wisc.library.ocfl.core.extension.OcflExtensionConfig;
 import edu.wisc.library.ocfl.core.extension.storage.layout.NTupleOmitPrefixStorageLayoutExtension;
@@ -74,6 +75,13 @@ public String getExtensionName() {
         return NTupleOmitPrefixStorageLayoutExtension.EXTENSION_NAME;
     }
 
+    public void setExtensionName(String extensionName) {
+        if (!Objects.equals(getExtensionName(), extensionName)) {
+            throw new OcflExtensionException(String.format("The extension name for %s must be %s; found %s.",
+                    getClass().getSimpleName(), getExtensionName(), extensionName));
+        }
+    }
+
     @JsonIgnore
     @Override
     public boolean hasParameters() {