diff --git a/gst/gdp/gstgdpdepay.h b/gst/gdp/gstgdpdepay.h
index 8345c8b646..2d6d39ae4d 100644
--- a/gst/gdp/gstgdpdepay.h
+++ b/gst/gdp/gstgdpdepay.h
@@ -30,10 +30,10 @@ G_BEGIN_DECLS
 #define GST_GDP_DEPAY(obj) \
   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GDP_DEPAY,GstGDPDepay))
 #define GST_GDP_DEPAY_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GDP_DEPAY,GstGDPDepay))
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GDP_DEPAY,GstGDPDepayClass))
 #define GST_IS_GDP_DEPAY(obj) \
   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GDP_DEPAY))
-#define GST_IS_GDP_DEPAY_CLASS(obj) \
+#define GST_IS_GDP_DEPAY_CLASS(klass) \
   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GDP_DEPAY))
 
 typedef enum {
diff --git a/gst/gdp/gstgdppay.h b/gst/gdp/gstgdppay.h
index 2dc02d91af..f90cadfad5 100644
--- a/gst/gdp/gstgdppay.h
+++ b/gst/gdp/gstgdppay.h
@@ -29,10 +29,10 @@ G_BEGIN_DECLS
 #define GST_GDP_PAY(obj) \
   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GDP_PAY,GstGDPPay))
 #define GST_GDP_PAY_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GDP_PAY,GstGDPPay))
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GDP_PAY,GstGDPPayClass))
 #define GST_IS_GDP_PAY(obj) \
   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GDP_PAY))
-#define GST_IS_GDP_PAY_CLASS(obj) \
+#define GST_IS_GDP_PAY_CLASS(klass) \
   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GDP_PAY))
 
 typedef struct _GstGDPPay GstGDPPay;