diff --git a/src/compiler/nir/nir_intrinsics.py b/src/compiler/nir/nir_intrinsics.py
index 4ab230265ec..08df13eb8f0 100644
--- a/src/compiler/nir/nir_intrinsics.py
+++ b/src/compiler/nir/nir_intrinsics.py
@@ -891,6 +891,7 @@ system_value("workgroup_id", 3)
 # The workgroup_index is intended for situations when a 3 dimensional
 # workgroup_id is not available on the HW, but a 1 dimensional index is.
 system_value("workgroup_index", 1)
+# API specific base added to the workgroup_id, e.g. baseGroup* of vkCmdDispatchBase
 system_value("base_workgroup_id", 3, bit_sizes=[32, 64])
 system_value("user_clip_plane", 4, indices=[UCP_ID])
 system_value("num_workgroups", 3)
@@ -927,6 +928,8 @@ system_value("workgroup_size", 3)
 # note: the definition of global_invocation_id is based on
 # ((workgroup_id + base_workgroup_id) * workgroup_size) + local_invocation_id.
 system_value("global_invocation_id", 3, bit_sizes=[32, 64])
+# API specific base added to the global_invocation_id
+# e.g. global_work_offset of clEnqueueNDRangeKernel
 system_value("base_global_invocation_id", 3, bit_sizes=[32, 64])
 system_value("global_invocation_index", 1, bit_sizes=[32, 64])
 system_value("work_dim", 1)