diff --git a/src/main/java/org/springframework/retry/annotation/Backoff.java b/src/main/java/org/springframework/retry/annotation/Backoff.java
index 6e6a136..15283f7 100644
--- a/src/main/java/org/springframework/retry/annotation/Backoff.java
+++ b/src/main/java/org/springframework/retry/annotation/Backoff.java
@@ -49,7 +49,8 @@ import org.springframework.retry.backoff.BackOffPolicy;
 public @interface Backoff {
 
 	/**
-	 * Synonym for {@link #delay()}.
+	 * Synonym for {@link #delay()}. When {@link #delay()} is non-zero, value of this element
+	 * is ignored, otherwise value of this element is taken.
 	 *
 	 * @return the delay in milliseconds (default 1000)
 	 */
@@ -57,8 +58,11 @@ public @interface Backoff {
 
 	/**
 	 * A canonical backoff period. Used as an initial value in the exponential case, and
-	 * as a minimum value in the uniform case.
-	 * @return the initial or canonical backoff period in milliseconds (default 1000)
+	 * as a minimum value in the uniform case. When the value of this element is 0,
+	 * value of element {@link #value()} istaken, otherwise value of this
+	 * element is taken and {@link #value()} is ignored.
+	 *
+	 * @return the initial or canonical backoff period in milliseconds (default 0)
 	 */
 	long delay() default 0;