diff --git a/main.c b/main.c
index 068b0b3..ec0e850 100644
--- a/main.c
+++ b/main.c
@@ -674,6 +674,7 @@ mainloop_vt(struct vkcube *vc)
 static int
 init_kms(struct vkcube *vc)
 {
+   fprintf(stderr, "vkcube not built with KMS support (no vulkan_intel.h)\n");
    return -1;
 }