diff --git a/api/all/src/main/java/io/opentelemetry/api/logs/LogRecordBuilder.java b/api/all/src/main/java/io/opentelemetry/api/logs/LogRecordBuilder.java
index c0239724b36..2c264fd18df 100644
--- a/api/all/src/main/java/io/opentelemetry/api/logs/LogRecordBuilder.java
+++ b/api/all/src/main/java/io/opentelemetry/api/logs/LogRecordBuilder.java
@@ -31,16 +31,22 @@ public interface LogRecordBuilder {
   /**
    * Set the epoch {@code timestamp}, using the timestamp and unit.
    *
-   * <p>The {@code timestamp} is the time at which the log record occurred. If unset, it will be set
-   * to the current time when {@link #emit()} is called.
+   * <p>The {@code timestamp} is the time at which the log record occurred. If unset, the timestamp
+   * will remain unset.
+   *
+   * <p>The observed timestamp will be set to the current time when {@link #emit()} is called if it
+   * is not explicitly set.
    */
   LogRecordBuilder setTimestamp(long timestamp, TimeUnit unit);
 
   /**
-   * Set the epoch {@code timestamp}, using the instant.
+   * Set the epoch {@code timestamp}, using the timestamp and unit.
+   *
+   * <p>The {@code timestamp} is the time at which the log record occurred. If unset, the timestamp
+   * will remain unset.
    *
-   * <p>The {@code timestamp} is the time at which the log record occurred. If unset, it will be set
-   * to the current time when {@link #emit()} is called.
+   * <p>The observed timestamp will be set to the current time when {@link #emit()} is called if it
+   * is not explicitly set.
    */
   LogRecordBuilder setTimestamp(Instant instant);