diff --git a/instrumentation/aws-sdk/aws-sdk-2.2/library/src/main/java/io/opentelemetry/instrumentation/awssdk/v2_2/RequestHeaderSetter.java b/instrumentation/aws-sdk/aws-sdk-2.2/library/src/main/java/io/opentelemetry/instrumentation/awssdk/v2_2/RequestHeaderSetter.java
index f61b7f1482..aab3b4d3f4 100644
--- a/instrumentation/aws-sdk/aws-sdk-2.2/library/src/main/java/io/opentelemetry/instrumentation/awssdk/v2_2/RequestHeaderSetter.java
+++ b/instrumentation/aws-sdk/aws-sdk-2.2/library/src/main/java/io/opentelemetry/instrumentation/awssdk/v2_2/RequestHeaderSetter.java
@@ -13,6 +13,6 @@ enum RequestHeaderSetter implements TextMapSetter<SdkHttpRequest.Builder> {
 
   @Override
   public void set(SdkHttpRequest.Builder builder, String name, String value) {
-    builder.appendHeader(name, value);
+    builder.putHeader(name, value);
   }
 }