diff --git a/gst-libs/gst/gl/gstglupload.c b/gst-libs/gst/gl/gstglupload.c
index b6e57105bb..51322bbf36 100644
--- a/gst-libs/gst/gl/gstglupload.c
+++ b/gst-libs/gst/gl/gstglupload.c
@@ -516,6 +516,7 @@ static GstCaps *
 _dma_buf_upload_transform_caps (gpointer impl, GstGLContext * context,
     GstPadDirection direction, GstCaps * caps)
 {
+  struct DmabufUpload *dmabuf = impl;
   GstCapsFeatures *passthrough =
       gst_caps_features_from_string
       (GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION);
@@ -563,6 +564,9 @@ _dma_buf_upload_transform_caps (gpointer impl, GstGLContext * context,
 
   gst_caps_features_free (passthrough);
 
+  GST_DEBUG_OBJECT (dmabuf->upload, "transformed %" GST_PTR_FORMAT " into %"
+      GST_PTR_FORMAT, caps, ret);
+
   return ret;
 }
 
@@ -802,6 +806,7 @@ static GstCaps *
 _direct_dma_buf_upload_transform_caps (gpointer impl, GstGLContext * context,
     GstPadDirection direction, GstCaps * caps)
 {
+  struct DmabufUpload *dmabuf = impl;
   GstCapsFeatures *passthrough =
       gst_caps_features_from_string
       (GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION);
@@ -857,6 +862,9 @@ _direct_dma_buf_upload_transform_caps (gpointer impl, GstGLContext * context,
 
   gst_caps_features_free (passthrough);
 
+  GST_DEBUG_OBJECT (dmabuf->upload, "transformed %" GST_PTR_FORMAT " into %"
+      GST_PTR_FORMAT, caps, ret);
+
   return ret;
 }