diff --git a/tests/kms/libkms-test-screen.c b/tests/kms/libkms-test-screen.c
index bbe972a0..d00ae547 100644
--- a/tests/kms/libkms-test-screen.c
+++ b/tests/kms/libkms-test-screen.c
@@ -42,7 +42,9 @@ static void kms_screen_probe(struct kms_screen *screen)
 	else
 		screen->connected = false;
 
-	memcpy(&screen->mode, &con->modes[0], sizeof(drmModeModeInfo));
+	if (con->modes)
+		memcpy(&screen->mode, &con->modes[0], sizeof(drmModeModeInfo));
+
 	screen->width = screen->mode.hdisplay;
 	screen->height = screen->mode.vdisplay;