diff --git a/sys/dshowdecwrapper/gstdshowaudiodec.cpp b/sys/dshowdecwrapper/gstdshowaudiodec.cpp
index 9fb83e5bee..ad73850391 100644
--- a/sys/dshowdecwrapper/gstdshowaudiodec.cpp
+++ b/sys/dshowdecwrapper/gstdshowaudiodec.cpp
@@ -364,6 +364,12 @@ gst_dshowaudiodec_base_init (gpointer klass)
   /* register */
   gst_element_class_add_pad_template (element_class, src);
   gst_element_class_add_pad_template (element_class, sink);
+
+  if (sinkcaps)
+    gst_caps_unref(sinkcaps);
+
+  if (srccaps)
+    gst_caps_unref(srccaps);
 }
 
 static void
diff --git a/sys/dshowdecwrapper/gstdshowvideodec.cpp b/sys/dshowdecwrapper/gstdshowvideodec.cpp
index 9c2f59cfc7..7288f72fd3 100644
--- a/sys/dshowdecwrapper/gstdshowvideodec.cpp
+++ b/sys/dshowdecwrapper/gstdshowvideodec.cpp
@@ -409,6 +409,12 @@ gst_dshowvideodec_base_init (gpointer klass)
 
   gst_element_class_add_pad_template (element_class, src);
   gst_element_class_add_pad_template (element_class, sink);
+
+  if (sinkcaps)
+    gst_caps_unref(sinkcaps);
+
+  if (srccaps)
+    gst_caps_unref(srccaps);
 }
 
 static void
diff --git a/sys/vdpau/gstvdpdecoder.c b/sys/vdpau/gstvdpdecoder.c
index b41861f0cb..c3892f235c 100644
--- a/sys/vdpau/gstvdpdecoder.c
+++ b/sys/vdpau/gstvdpdecoder.c
@@ -360,6 +360,9 @@ gst_vdp_decoder_class_init (GstVdpDecoderClass * klass)
 
   gst_element_class_add_pad_template (element_class, src_template);
 
+  if (src_caps)
+    gst_caps_unref (src_caps);
+
   g_object_class_install_property (object_class,
       PROP_DISPLAY, g_param_spec_string ("display", "Display", "X Display name",
           NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));