From 70ece1b05b85b7907754755f4b7261f8c51d225b Mon Sep 17 00:00:00 2001
From: Justin Lee <justin.lee@datadoghq.com>
Date: Fri, 28 Feb 2025 13:26:05 -0500
Subject: [PATCH] use proper class def to find interfaces

---
 .../grpc/server/MethodHandlersInstrumentation.java              | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dd-java-agent/instrumentation/grpc-1.5/src/main/java/datadog/trace/instrumentation/grpc/server/MethodHandlersInstrumentation.java b/dd-java-agent/instrumentation/grpc-1.5/src/main/java/datadog/trace/instrumentation/grpc/server/MethodHandlersInstrumentation.java
index 35cc6e901ba..14c08edc9ed 100644
--- a/dd-java-agent/instrumentation/grpc-1.5/src/main/java/datadog/trace/instrumentation/grpc/server/MethodHandlersInstrumentation.java
+++ b/dd-java-agent/instrumentation/grpc-1.5/src/main/java/datadog/trace/instrumentation/grpc/server/MethodHandlersInstrumentation.java
@@ -59,7 +59,7 @@ public static void onEnter(@Advice.Argument(0) Object serviceImpl) {
         if (superClass != null) {
           // bindService() would be the only method in this case and it's irrelevant
           if (superClass.getDeclaredMethods().length == 1) {
-            for (Class<?> i : serviceClass.getInterfaces()) {
+            for (Class<?> i : superClass.getInterfaces()) {
               if (i.getSimpleName().equals("AsyncService")) {
                 superClass = i;
                 break;