diff --git a/OpenCL/inc_vendor.cl b/OpenCL/inc_vendor.cl
index e6acd7d23..300987093 100644
--- a/OpenCL/inc_vendor.cl
+++ b/OpenCL/inc_vendor.cl
@@ -189,6 +189,9 @@
 #if KERN_TYPE == 8000
 #undef _unroll
 #endif
+#if KERN_TYPE == 15300
+#undef _unroll
+#endif
 
 #endif
 #endif