diff --git a/include/kernel_vendor.h b/include/kernel_vendor.h
index d364256c9..61105371f 100644
--- a/include/kernel_vendor.h
+++ b/include/kernel_vendor.h
@@ -80,6 +80,9 @@
 #if KERN_TYPE == 7400
 #undef _unroll
 #endif
+#if KERN_TYPE == 7900
+#undef _unroll
+#endif
 #if KERN_TYPE == 8200
 #undef _unroll
 #endif