diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index fdb7ccefffbd..66c90d4477a3 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -704,6 +704,7 @@ static void i915_ring_error_state(struct seq_file *m,
 				  struct drm_i915_error_state *error,
 				  unsigned ring)
 {
+	BUG_ON(ring > VCS); /* shut up confused gcc */
 	seq_printf(m, "%s command stream:\n", ring_str(ring));
 	seq_printf(m, "  HEAD: 0x%08x\n", error->head[ring]);
 	seq_printf(m, "  TAIL: 0x%08x\n", error->tail[ring]);