diff --git a/pyopencl/__init__.py b/pyopencl/__init__.py
index 1fe13c3eb3bca9a212a218b1513108d115922096..8660a77b7d55aa5827274c0290508a4f3aeba1a2 100644
--- a/pyopencl/__init__.py
+++ b/pyopencl/__init__.py
@@ -225,16 +225,8 @@ BITFIELD_CONSTANT_CLASSES = (
         _cl.mem_flags,
         _cl.map_flags,
         _cl.kernel_arg_type_qualifier,
-        )
-
-if get_cl_header_version() >= (1, 2):
-    BITFIELD_CONSTANT_CLASSES += (
         _cl.device_affinity_domain,
         _cl.mem_migration_flags,
-        )
-
-if get_cl_header_version() >= (2, 0):
-    BITFIELD_CONSTANT_CLASSES += (
         _cl.device_svm_capabilities,
         _cl.queue_properties,
         _cl.svm_mem_flags,