diff --git a/test_conformance/basic/test_work_item_functions.cpp b/test_conformance/basic/test_work_item_functions.cpp
index 046640b3..6098374c 100644
--- a/test_conformance/basic/test_work_item_functions.cpp
+++ b/test_conformance/basic/test_work_item_functions.cpp
@@ -476,7 +476,7 @@ struct TestWorkItemFnsOutOfRange
                                                maxWorkItemSizes[2] };
             // check if maximum work group size for current dimention is not
             // exceeded
-            cl_uint work_group_size = max_workgroup_size + 1;
+            size_t work_group_size = max_workgroup_size + 1;
             while (max_workgroup_size < work_group_size && work_group_size != 1)
             {
                 work_group_size = 1;
@@ -492,9 +492,9 @@ struct TestWorkItemFnsOutOfRange
 
             // compute max number of work groups based on buffer size and max
             // group size
-            cl_uint max_work_groups = testData.size() / work_group_size;
+            size_t max_work_groups = testData.size() / work_group_size;
             // take into account number of dimentions
-            cl_uint work_groups_per_dim =
+            size_t work_groups_per_dim =
                 std::max(1, (int)pow(max_work_groups, 1.f / dim));
 
             for (size_t j = 0; j < dim; j++)