diff --git a/spring-core/src/main/java/org/springframework/core/task/TaskCallback.java b/spring-core/src/main/java/org/springframework/core/task/TaskCallback.java
index d1f1f64d264..a5b7a05fb4f 100644
--- a/spring-core/src/main/java/org/springframework/core/task/TaskCallback.java
+++ b/spring-core/src/main/java/org/springframework/core/task/TaskCallback.java
@@ -36,6 +36,7 @@ import org.jspecify.annotations.Nullable;
  * @param <E> the exception propagated, if any
  * @see SyncTaskExecutor#execute(TaskCallback)
  */
+@FunctionalInterface
 public interface TaskCallback<V extends @Nullable Object, E extends Exception> extends Callable<V> {
 
 	@Override