diff --git a/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethodParameter.java b/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethodParameter.java
index bad1e144e1f3..bd1e39a3098a 100644
--- a/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethodParameter.java
+++ b/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethodParameter.java
@@ -80,6 +80,7 @@ public boolean isMandatory() {
 	@SuppressWarnings("deprecation")
 	private boolean isOptional() {
 		return this.parameter.getAnnotationsByType(org.springframework.lang.Nullable.class).length > 0
+				|| this.parameter.getAnnotatedType().isAnnotationPresent(org.jspecify.annotations.Nullable.class)
 				|| this.optional.test(this.parameter);
 	}
 
diff --git a/module/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethodParameterTests.java b/module/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethodParameterTests.java
index d8be6c5a022e..5ab2072543ce 100644
--- a/module/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethodParameterTests.java
+++ b/module/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethodParameterTests.java
@@ -61,6 +61,9 @@ class OperationMethodParameterTests {
 
 	private Method exampleAnnotation = ReflectionUtils.findMethod(getClass(), "exampleAnnotation", String.class);
 
+	private final Method exampleJSpecifyNullable = ReflectionUtils.findMethod(getClass(), "exampleJSpecifyNullable",
+			String.class, String.class);
+
 	@Test
 	void getNameShouldReturnName() {
 		OperationMethodParameter parameter = new OperationMethodParameter("name", this.example.getParameters()[0],
@@ -126,6 +129,13 @@ void getAnnotationShouldReturnAnnotation() {
 		assertThat(annotation.match()).isEqualTo(Match.ALL_REMAINING);
 	}
 
+	@Test
+	void isMandatoryWhenJSpecifyNullableAnnotationShouldReturnFalse() {
+		OperationMethodParameter parameter = new OperationMethodParameter("name",
+				this.exampleJSpecifyNullable.getParameters()[1], this::isOptionalParameter);
+		assertThat(parameter.isMandatory()).isFalse();
+	}
+
 	private boolean isOptionalParameter(Parameter parameter) {
 		return MergedAnnotations.from(parameter).isPresent(TestOptional.class);
 	}
@@ -149,6 +159,9 @@ void exampleJsr305NonNull(String one, @javax.annotation.Nonnull String two) {
 	void exampleAnnotation(@Selector(match = Match.ALL_REMAINING) String allRemaining) {
 	}
 
+	void exampleJSpecifyNullable(String one, @org.jspecify.annotations.Nullable String two) {
+	}
+
 	@TypeQualifier
 	@Retention(RetentionPolicy.RUNTIME)
 	@Nonnull(when = When.MAYBE)