diff --git a/ext/opus/gstopusheader.c b/ext/opus/gstopusheader.c
index 70844c4915..b654aad325 100644
--- a/ext/opus/gstopusheader.c
+++ b/ext/opus/gstopusheader.c
@@ -143,6 +143,7 @@ _gst_caps_set_buffer_array (GstCaps * caps, const gchar * field,
 
     buf = va_arg (va, GstBuffer *);
   }
+  va_end (va);
 
   gst_structure_set_value (structure, field, &array);
   g_value_unset (&array);