diff --git a/dd-java-agent/instrumentation/grpc-1.5/src/main/java/datadog/trace/instrumentation/grpc/server/GrpcServerBuilderInstrumentation.java b/dd-java-agent/instrumentation/grpc-1.5/src/main/java/datadog/trace/instrumentation/grpc/server/GrpcServerBuilderInstrumentation.java
index 2baaa04ff6..6159deb5ff 100644
--- a/dd-java-agent/instrumentation/grpc-1.5/src/main/java/datadog/trace/instrumentation/grpc/server/GrpcServerBuilderInstrumentation.java
+++ b/dd-java-agent/instrumentation/grpc-1.5/src/main/java/datadog/trace/instrumentation/grpc/server/GrpcServerBuilderInstrumentation.java
@@ -31,6 +31,7 @@ public class GrpcServerBuilderInstrumentation extends Instrumenter.Default {
   public String[] helperClassNames() {
     return new String[] {
       "datadog.trace.instrumentation.grpc.server.TracingServerInterceptor",
+      "datadog.trace.instrumentation.grpc.server.TracingServerInterceptor$TracingServerCall",
       "datadog.trace.instrumentation.grpc.server.TracingServerInterceptor$TracingServerCallListener",
       "datadog.trace.agent.decorator.BaseDecorator",
       "datadog.trace.agent.decorator.ServerDecorator",