diff --git a/spring-grpc-core/src/main/java/org/springframework/grpc/server/exception/ReactiveStubBeanDefinitionRegistrar.java b/spring-grpc-core/src/main/java/org/springframework/grpc/server/exception/ReactiveStubBeanDefinitionRegistrar.java
index 06794d8..81cc438 100644
--- a/spring-grpc-core/src/main/java/org/springframework/grpc/server/exception/ReactiveStubBeanDefinitionRegistrar.java
+++ b/spring-grpc-core/src/main/java/org/springframework/grpc/server/exception/ReactiveStubBeanDefinitionRegistrar.java
@@ -92,13 +92,14 @@ public class ReactiveStubBeanDefinitionRegistrar implements ImportBeanDefinition
 			for (String name : factory.getBeanNamesForType(BindableService.class)) {
 				BeanDefinition service = factory.getBeanDefinition(name);
 				Class<?> type = factory.getType(name);
-				if (type != null && ReflectionUtils.findMethod(type, "onErrorMap", Throwable.class) != null) {
-					if (service instanceof AbstractBeanDefinition root) {
+				if (type != null) {
+					Method method = ReflectionUtils.findMethod(type, "onErrorMap", Throwable.class);
+					if (method != null && method.getDeclaringClass() != type
+							&& service instanceof AbstractBeanDefinition root) {
 						ReplaceOverride override = new ReplaceOverride("onErrorMap", BEAN_NAME);
-						// You need this in an AOT build (but the interceptor still isn't
-						// used
-						// at runtime with AOT
-						// https://github.com/spring-projects/spring-framework/issues/34642)
+						// You need this in an AOT build (but the interceptor still
+						// isn't used at runtime with AOT
+						// spring-projects/spring-framework#34642)
 						override.addTypeIdentifier("Throwable");
 						root.getMethodOverrides().addOverride(override);
 					}
diff --git a/spring-grpc-core/src/test/java/org/springframework/grpc/server/exception/ReactiveStubBeanDefinitionRegistrarTests.java b/spring-grpc-core/src/test/java/org/springframework/grpc/server/exception/ReactiveStubBeanDefinitionRegistrarTests.java
new file mode 100644
index 0000000..6e26487
--- /dev/null
+++ b/spring-grpc-core/src/test/java/org/springframework/grpc/server/exception/ReactiveStubBeanDefinitionRegistrarTests.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2024-2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.grpc.server.exception;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.support.AbstractBeanDefinition;
+import org.springframework.context.support.StaticApplicationContext;
+import org.springframework.core.type.AnnotationMetadata;
+
+import io.grpc.BindableService;
+import io.grpc.ServerServiceDefinition;
+
+public class ReactiveStubBeanDefinitionRegistrarTests {
+
+	private static final String BEAN_NAME = ReactiveStubBeanDefinitionRegistrar.ReactiveStubBeanFactoryPostProcessor.BEAN_NAME;
+
+	private StaticApplicationContext registry = new StaticApplicationContext();
+
+	private ReactiveStubBeanDefinitionRegistrar registrar = new ReactiveStubBeanDefinitionRegistrar();
+
+	private AnnotationMetadata metadata = null;
+
+	private ReactiveStubBeanDefinitionRegistrar.ReactiveStubBeanFactoryPostProcessor processor;
+
+	@BeforeEach
+	void setup() {
+		registry.registerSingleton("exceptionHandler", GrpcExceptionHandler.class);
+		registrar.registerBeanDefinitions(metadata, registry);
+		processor = (ReactiveStubBeanDefinitionRegistrar.ReactiveStubBeanFactoryPostProcessor) registry
+			.getBean(BEAN_NAME);
+		processor.setApplicationContext(registry);
+	}
+
+	@Test
+	void defaultDoNothing() {
+		assertThat(registry.containsBeanDefinition(BEAN_NAME)).isTrue();
+	}
+
+	@Test
+	void postProcessNonReactiveBean() {
+		registry.registerBean("service", MyService.class);
+		processor.postProcessBeanFactory(registry.getDefaultListableBeanFactory());
+		AbstractBeanDefinition bean = (AbstractBeanDefinition) registry.getBeanDefinition("service");
+		assertThat(bean.hasMethodOverrides()).isFalse();
+	}
+
+	@Test
+	void postProcessReactiveBean() {
+		registry.registerBean("service", MyReactiveService.class);
+		processor.postProcessBeanFactory(registry.getDefaultListableBeanFactory());
+		AbstractBeanDefinition bean = (AbstractBeanDefinition) registry.getBeanDefinition("service");
+		assertThat(bean.hasMethodOverrides()).isTrue();
+	}
+
+	@Test
+	void postProcessReactiveBeanWithOnErrorMap() {
+		registry.registerBean("service", MyReactiveStub.class);
+		processor.postProcessBeanFactory(registry.getDefaultListableBeanFactory());
+		AbstractBeanDefinition bean = (AbstractBeanDefinition) registry.getBeanDefinition("service");
+		assertThat(bean.hasMethodOverrides()).isFalse();
+	}
+
+	static class MyService implements BindableService {
+
+		@Override
+		public ServerServiceDefinition bindService() {
+			return null;
+		}
+
+	}
+
+	static class MyReactiveService extends MyReactiveStub {
+
+	}
+
+	static class MyReactiveStub implements BindableService {
+
+		@Override
+		public ServerServiceDefinition bindService() {
+			return null;
+		}
+
+		protected Throwable onErrorMap(Throwable throwable) {
+			return throwable;
+		}
+
+	}
+
+}