1 files changed, 2 insertions, 2 deletions
diff --git a/ext/arts/gst_arts.h b/ext/arts/gst_arts.h
index cf0ead064..fad6d7d15 100644
--- a/ext/arts/gst_arts.h
+++ b/ext/arts/gst_arts.h
@@ -36,10 +36,10 @@ extern "C" {
 #define GST_ARTS(obj) \
   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ARTS,GstARTS))
 #define GST_ARTS_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ARTS,GstARTS))
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ARTS,GstARTSClass))
 #define GST_IS_ARTS(obj) \
   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ARTS))
-#define GST_IS_ARTS_CLASS(obj) \
+#define GST_IS_ARTS_CLASS(klass) \
   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ARTS))
 
 typedef struct _GstARTS GstARTS;