diff --git a/subprojects/gstreamer/gst/gstformat.c b/subprojects/gstreamer/gst/gstformat.c
index 130fc77f18..b9f2560dfc 100644
--- a/subprojects/gstreamer/gst/gstformat.c
+++ b/subprojects/gstreamer/gst/gstformat.c
@@ -153,7 +153,7 @@ gst_format_register (const gchar * nick, const gchar * description)
     return query;
 
   g_mutex_lock (&mutex);
-  format = g_slice_new (GstFormatDefinition);
+  format = g_new (GstFormatDefinition, 1);
   format->value = (GstFormat) _n_values;
   format->nick = g_strdup (nick);
   format->description = g_strdup (description);
diff --git a/subprojects/gstreamer/gst/gstmeta.c b/subprojects/gstreamer/gst/gstmeta.c
index 9fc619860f..6068210c36 100644
--- a/subprojects/gstreamer/gst/gstmeta.c
+++ b/subprojects/gstreamer/gst/gstmeta.c
@@ -78,7 +78,7 @@ typedef struct
 static void
 free_info (gpointer data)
 {
-  g_slice_free (GstMetaInfoImpl, data);
+  g_free (data);
 }
 
 void
@@ -394,7 +394,7 @@ gst_meta_register (GType api, const gchar * impl, gsize size,
   if (type == G_TYPE_INVALID)
     return NULL;
 
-  info = (GstMetaInfo *) g_slice_new (GstMetaInfoImpl);
+  info = (GstMetaInfo *) g_new (GstMetaInfoImpl, 1);
   info->api = api;
   info->type = type;
   info->size = size;