diff --git a/subprojects/gst-plugins-base/gst-libs/gst/video/gstvideopool.c b/subprojects/gst-plugins-base/gst-libs/gst/video/gstvideopool.c
index fd4198d79f..9840b4d2be 100644
--- a/subprojects/gst-plugins-base/gst-libs/gst/video/gstvideopool.c
+++ b/subprojects/gst-plugins-base/gst-libs/gst/video/gstvideopool.c
@@ -77,7 +77,7 @@ gst_buffer_pool_config_set_video_alignment (GstStructure * config,
  * Returns: %TRUE if @config could be parsed correctly.
  */
 gboolean
-gst_buffer_pool_config_get_video_alignment (GstStructure * config,
+gst_buffer_pool_config_get_video_alignment (const GstStructure * config,
     GstVideoAlignment * align)
 {
   g_return_val_if_fail (config != NULL, FALSE);
diff --git a/subprojects/gst-plugins-base/gst-libs/gst/video/gstvideopool.h b/subprojects/gst-plugins-base/gst-libs/gst/video/gstvideopool.h
index 6fd0db1bcd..e5ca7cf799 100644
--- a/subprojects/gst-plugins-base/gst-libs/gst/video/gstvideopool.h
+++ b/subprojects/gst-plugins-base/gst-libs/gst/video/gstvideopool.h
@@ -51,7 +51,7 @@ GST_VIDEO_API
 void             gst_buffer_pool_config_set_video_alignment  (GstStructure *config, const GstVideoAlignment *align);
 
 GST_VIDEO_API
-gboolean         gst_buffer_pool_config_get_video_alignment  (GstStructure *config, GstVideoAlignment *align);
+gboolean         gst_buffer_pool_config_get_video_alignment  (const GstStructure *config, GstVideoAlignment *align);
 
 /* video bufferpool */
 typedef struct _GstVideoBufferPool GstVideoBufferPool;