diff --git a/src/gbm/backends/dri/gbm_dri.c b/src/gbm/backends/dri/gbm_dri.c
index dff0b3c7ecf..e1ec561a117 100644
--- a/src/gbm/backends/dri/gbm_dri.c
+++ b/src/gbm/backends/dri/gbm_dri.c
@@ -298,6 +298,8 @@ dri_bind_extensions(struct gbm_dri_device *dri,
    for (size_t j = 0; j < num_matches; j++) {
       field = ((char *) dri + matches[j].offset);
       if ((*(const __DRIextension **) field == NULL) && !matches[j].optional) {
+         fprintf(stderr, "gbm: did not find extension %s version %d\n",
+                 matches[j].name, matches[j].version);
          ret = false;
       }
    }