diff --git a/spring-credhub-core/src/main/java/org/springframework/credhub/core/CredHubTemplate.java b/spring-credhub-core/src/main/java/org/springframework/credhub/core/CredHubTemplate.java
index 6b514b7..5d5cd13 100644
--- a/spring-credhub-core/src/main/java/org/springframework/credhub/core/CredHubTemplate.java
+++ b/spring-credhub-core/src/main/java/org/springframework/credhub/core/CredHubTemplate.java
@@ -303,7 +303,7 @@ public class CredHubTemplate implements CredHubOperations {
 
 		return doWithRest(new RestOperationsCallback<List<CredentialPermission>>() {
 			@Override
-			public void doWithRestOperations(RestOperations restOperations) {
+			public Void doWithRestOperations(RestOperations restOperations) {
 				ResponseEntity<CredentialPermissions> response =
 						restOperations.exchange(PERMISSIONS_URL_PATH, POST,
 								new HttpEntity<CredentialPermissions>(credentialPermissions),