diff --git a/ext/wavpack/gstwavpackenc.h b/ext/wavpack/gstwavpackenc.h
index 0925b08aeb..df57f670cb 100644
--- a/ext/wavpack/gstwavpackenc.h
+++ b/ext/wavpack/gstwavpackenc.h
@@ -37,7 +37,7 @@ G_BEGIN_DECLS
   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_WAVPACK_ENC,GstWavpackEnc))
 #define GST_IS_WAVPACK_ENC(obj) \
   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_WAVPACK_ENC))
-#define GST_IS_WAVPACK_ENC_CLASS(obj) \
+#define GST_IS_WAVPACK_ENC_CLASS(klass) \
   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_WAVPACK_ENC))
 
 typedef struct _GstWavpackEnc GstWavpackEnc;
diff --git a/gst/equalizer/gstiirequalizer.c b/gst/equalizer/gstiirequalizer.c
index 54f0720a61..1b3689fd5b 100644
--- a/gst/equalizer/gstiirequalizer.c
+++ b/gst/equalizer/gstiirequalizer.c
@@ -38,7 +38,7 @@ typedef struct _GstIirEqualizerClass GstIirEqualizerClass;
   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_IIR_EQUALIZER,GstIirEqualizerClass))
 #define GST_IS_IIR_EQUALIZER(obj) \
   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_IIR_EQUALIZER))
-#define GST_IS_IIR_EQUALIZER_CLASS(obj) \
+#define GST_IS_IIR_EQUALIZER_CLASS(klass) \
   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_IIR_EQUALIZER))
 
 #define LOWEST_FREQ (20.0)