diff --git a/hw/xfree86/modes/xf86Crtc.c b/hw/xfree86/modes/xf86Crtc.c
index 0ab2f3df9..b40e09605 100644
--- a/hw/xfree86/modes/xf86Crtc.c
+++ b/hw/xfree86/modes/xf86Crtc.c
@@ -3140,6 +3140,9 @@ xf86_crtc_supports_gamma(ScrnInfoPtr pScrn)
 	xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
 	xf86CrtcPtr crtc;
 
+	/* for multiple drivers loaded we need this */
+	if (!xf86_config)
+		return FALSE;
 	if (xf86_config->num_crtc == 0)
 	    return FALSE;
 	crtc = xf86_config->crtc[0];