diff --git a/providers/google-cloud-storage/src/main/java/org/jclouds/googlecloudstorage/domain/templates/ComposeObjectTemplate.java b/providers/google-cloud-storage/src/main/java/org/jclouds/googlecloudstorage/domain/templates/ComposeObjectTemplate.java
index 4ad8d5ec9c..3f333d8455 100644
--- a/providers/google-cloud-storage/src/main/java/org/jclouds/googlecloudstorage/domain/templates/ComposeObjectTemplate.java
+++ b/providers/google-cloud-storage/src/main/java/org/jclouds/googlecloudstorage/domain/templates/ComposeObjectTemplate.java
@@ -37,7 +37,7 @@ public abstract class ComposeObjectTemplate {
 
       @AutoValue
       public abstract static class ObjectPreconditions {
-         @Nullable public abstract long ifGenerationMatch();
+         public abstract long ifGenerationMatch();
 
          @SerializedNames({"ifGenerationMatch"})
          public static ObjectPreconditions create(long ifGenerationMatch){
diff --git a/providers/google-cloud-storage/src/main/java/org/jclouds/googlecloudstorage/features/ObjectApi.java b/providers/google-cloud-storage/src/main/java/org/jclouds/googlecloudstorage/features/ObjectApi.java
index 4e4f5b93ff..ab8cab6f62 100644
--- a/providers/google-cloud-storage/src/main/java/org/jclouds/googlecloudstorage/features/ObjectApi.java
+++ b/providers/google-cloud-storage/src/main/java/org/jclouds/googlecloudstorage/features/ObjectApi.java
@@ -85,7 +85,6 @@ public interface ObjectApi {
    @GET
    @Path("storage/v1/b/{bucket}/o/{object}")
    @Fallback(FalseOnNotFoundOr404.class)
-   @Nullable
    boolean objectExists(@PathParam("bucket") String bucketName, @PathParam("object") @Encoded String objectName);
 
    /**