diff --git a/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Blob.java b/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Blob.java
index ece38ee3cdd0..6a8455260e9f 100644
--- a/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Blob.java
+++ b/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Blob.java
@@ -243,7 +243,7 @@ public BlobWriteChannel writer(BlobTargetOption... options) {
    * want to require users to explicitly log in.
    *
    * @param duration time until the signed URL expires, expressed in {@code unit}. The finer
-   * granularity supported is 1 second
+   * granularity supported is 1 second, finer granularities will be truncated
    * @param unit time unit of the {@code duration} parameter
    * @param options optional URL signing options
    * @return a signed URL for this bucket and the specified options
diff --git a/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Storage.java b/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Storage.java
index 8d7139adeeca..825248f99e7f 100644
--- a/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Storage.java
+++ b/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Storage.java
@@ -641,7 +641,7 @@ public static Builder builder() {
    *
    * @param blobInfo the blob associated with the signed URL
    * @param duration time until the signed URL expires, expressed in {@code unit}. The finer
-   * granularity supported is 1 second
+   * granularity supported is 1 second, finer granularities will be truncated
    * @param unit time unit of the {@code duration} parameter
    * @param options optional URL signing options
    * @see <a href="https://cloud.google.com/storage/docs/access-control#Signed-URLs">Signed-URLs</a>