diff --git a/spec/core/HNamespace.spec.ts b/spec/core/HNamespace.spec.ts
index 6d7bc7f..616f7ae 100644
--- a/spec/core/HNamespace.spec.ts
+++ b/spec/core/HNamespace.spec.ts
@@ -1938,11 +1938,9 @@ describe('HNamespace', function (): void {
 		})
 	}) // #getContainmentRefs()
 
-	describe('#findContainmentRefs()', function (): void {
-		it('returns a list of all the containment refs for a def', function (): void {
-			expect(
-				defs.findContainmentRefs('site').map((def) => def.defName)
-			).toEqual(['siteRef'])
+	describe('#findContainmentRef()', function (): void {
+		it('returns the containment ref for a def', function (): void {
+			expect(defs.findContainmentRef('site')?.defName).toEqual('siteRef')
 		})
-	}) // #findContainmentRefs()
+	}) // #findContainmentRef()
 })
diff --git a/src/core/HNamespace.ts b/src/core/HNamespace.ts
index 0fea3be..8823b1a 100644
--- a/src/core/HNamespace.ts
+++ b/src/core/HNamespace.ts
@@ -1659,18 +1659,18 @@ export class HNamespace {
 	}
 
 	/**
-	 * Return all the containment refs for the specified def.
+	 * Return the first containment ref def that matches the specified name.
 	 *
 	 * Please note, this will filter out any defs that are marked as deprecated.
 	 *
 	 * @param name The name of the def to search the ref for.
-	 * @returns The containment defs.
+	 * @returns The containment ref def.
 	 */
-	public findContainmentRefs(name: string | HSymbol): HDict[] {
+	public findContainmentRef(name: string | HSymbol): HDict | undefined {
 		return this.getContainmentRefs().filter(
 			(def) =>
 				!def.has('deprecated') &&
 				this.fits(name, def.get('containedBy') as HSymbol)
-		)
+		)[0]
 	}
 }
diff --git a/src/core/util.ts b/src/core/util.ts
index 6b61f01..f6eda7a 100644
--- a/src/core/util.ts
+++ b/src/core/util.ts
@@ -573,13 +573,13 @@ export function addContainmentRefs(
 		dict.set('spaceRef', spaceRef)
 	}
 
-	const refName = namespace.findContainmentRefs(
-		namespace.reflect(parent).type.defName
-	)?.[0]?.defName
+	const refName =
+		namespace.findContainmentRef(namespace.reflect(parent).type.defName)
+			?.defName ?? ''
 
 	if (refName && !dict.has(refName)) {
 		dict.set(refName, parent.get('id') as HRef)
 	}
 
-	return refName ?? ''
+	return refName
 }