diff --git a/hw/xfree86/common/xf86Init.c b/hw/xfree86/common/xf86Init.c
index 7de7a3f49..45c116a8b 100644
--- a/hw/xfree86/common/xf86Init.c
+++ b/hw/xfree86/common/xf86Init.c
@@ -297,15 +297,15 @@ DoModalias(void)
                  ErrorF("sd%08X", match->subdevice_id);
 
              /* Class */
-             if (match->device_class_mask >> 16 & 0xFF == 0xFF)
+             if ((match->device_class_mask >> 16 & 0xFF) == 0xFF)
                  ErrorF("bc%02X", match->device_class >> 16 & 0xFF);
              else
                  ErrorF("bc*");
-             if (match->device_class_mask >> 8 & 0xFF == 0xFF)
+             if ((match->device_class_mask >> 8 & 0xFF) == 0xFF)
                  ErrorF("sc%02X", match->device_class >> 8 & 0xFF);
              else
                  ErrorF("sc*");
-             if (match->device_class_mask & 0xFF == 0xFF)
+             if ((match->device_class_mask & 0xFF) == 0xFF)
                  ErrorF("i%02X*", match->device_class & 0xFF);
              else
                  ErrorF("i*");