diff --git a/apis/sts/src/main/java/org/jclouds/aws/config/FormSigningHttpApiModule.java b/apis/sts/src/main/java/org/jclouds/aws/config/FormSigningHttpApiModule.java
index 8613bc3615..bb677cd5c6 100644
--- a/apis/sts/src/main/java/org/jclouds/aws/config/FormSigningHttpApiModule.java
+++ b/apis/sts/src/main/java/org/jclouds/aws/config/FormSigningHttpApiModule.java
@@ -31,6 +31,8 @@ import org.jclouds.rest.RequestSigner;
 import com.google.inject.Provides;
 
 /**
+ * Configures signature process and dependencies needed for AWS Query apis
+ * (which we sent as POST requests, hence the name Form).
  * 
  * @author Adrian Cole
  */