diff --git a/dd-java-agent/instrumentation/netty-3.8/src/main/java/datadog/trace/instrumentation/netty38/ChannelFutureListenerInstrumentation.java b/dd-java-agent/instrumentation/netty-3.8/src/main/java/datadog/trace/instrumentation/netty38/ChannelFutureListenerInstrumentation.java
index 224d04650a..bb9cb66b62 100644
--- a/dd-java-agent/instrumentation/netty-3.8/src/main/java/datadog/trace/instrumentation/netty38/ChannelFutureListenerInstrumentation.java
+++ b/dd-java-agent/instrumentation/netty-3.8/src/main/java/datadog/trace/instrumentation/netty38/ChannelFutureListenerInstrumentation.java
@@ -41,6 +41,7 @@ public class ChannelFutureListenerInstrumentation extends Instrumenter.Default {
     // Optimization for expensive typeMatcher.
     return hasClassesNamed(
         "org.jboss.netty.channel.ChannelFutureListener",
+        // 3.10: NoSuchMethodError: org.jboss.netty.handler.codec.http.HttpRequest.setHeader
         "org.jboss.netty.channel.StaticChannelPipeline" // Not in 3.10
         );
   }
diff --git a/dd-java-agent/instrumentation/netty-3.8/src/main/java/datadog/trace/instrumentation/netty38/NettyChannelInstrumentation.java b/dd-java-agent/instrumentation/netty-3.8/src/main/java/datadog/trace/instrumentation/netty38/NettyChannelInstrumentation.java
index 8bf14125a5..12ab34dd1d 100644
--- a/dd-java-agent/instrumentation/netty-3.8/src/main/java/datadog/trace/instrumentation/netty38/NettyChannelInstrumentation.java
+++ b/dd-java-agent/instrumentation/netty-3.8/src/main/java/datadog/trace/instrumentation/netty38/NettyChannelInstrumentation.java
@@ -34,7 +34,9 @@ public class NettyChannelInstrumentation extends Instrumenter.Default {
     // Optimization for expensive typeMatcher.
     return hasClassesNamed(
         "org.jboss.netty.channel.Channel",
+        // 3.7: cannot find symbol method headers() for type HttpRequest
         "org.jboss.netty.handler.codec.http.DefaultHttpHeaders", // Not in 3.7
+        // 3.10: NoSuchMethodError: org.jboss.netty.handler.codec.http.HttpRequest.setHeader
         "org.jboss.netty.channel.StaticChannelPipeline" // Not in 3.10
         );
   }
diff --git a/dd-java-agent/instrumentation/netty-3.8/src/main/java/datadog/trace/instrumentation/netty38/NettyChannelPipelineInstrumentation.java b/dd-java-agent/instrumentation/netty-3.8/src/main/java/datadog/trace/instrumentation/netty38/NettyChannelPipelineInstrumentation.java
index dea115942b..be466677ed 100644
--- a/dd-java-agent/instrumentation/netty-3.8/src/main/java/datadog/trace/instrumentation/netty38/NettyChannelPipelineInstrumentation.java
+++ b/dd-java-agent/instrumentation/netty-3.8/src/main/java/datadog/trace/instrumentation/netty38/NettyChannelPipelineInstrumentation.java
@@ -50,6 +50,7 @@ public class NettyChannelPipelineInstrumentation extends Instrumenter.Default {
     // Optimization for expensive typeMatcher.
     return hasClassesNamed(
         "org.jboss.netty.channel.ChannelPipeline",
+        // 3.10: NoSuchMethodError: org.jboss.netty.handler.codec.http.HttpRequest.setHeader
         "org.jboss.netty.channel.StaticChannelPipeline" // Not in 3.10
         );
   }