diff --git a/src/main/java/com/inteligr8/rs/OAuthRequestFilter.java b/src/main/java/com/inteligr8/rs/OAuthRequestFilter.java
index 392d09a..2c4edce 100644
--- a/src/main/java/com/inteligr8/rs/OAuthRequestFilter.java
+++ b/src/main/java/com/inteligr8/rs/OAuthRequestFilter.java
@@ -56,9 +56,9 @@ public abstract class OAuthRequestFilter implements ClientRequestFilter {
 			form = this.createForm();
 		}
 
-		form.param("clientId", this.clientId);
+		form.param("client_id", this.clientId);
 		if (this.clientSecret != null)
-			form.param("clientSecret", this.clientSecret);
+			form.param("client_secret", this.clientSecret);
 		if (this.scope != null)
 			form.param("scope", this.scope);