diff --git a/pyopencl/scan.py b/pyopencl/scan.py
index 23c3277740a2f4f5953cbe80575fce61d52175b1..6919ea551df74f2ea65d5cd8bf57ee9fb2c195fa 100644
--- a/pyopencl/scan.py
+++ b/pyopencl/scan.py
@@ -783,6 +783,7 @@ _IGNORED_WORDS = set("""
         pragma __attribute__ __global __kernel __local
         get_local_size get_local_id cl_khr_fp64 reqd_work_group_size
         get_num_groups barrier get_group_id
+        CL_VERSION_1_1 __OPENCL_VERSION__
 
         _final_update _debug_scan kernel_name