Index: cmake/OpenMPTesting.cmake
===================================================================
--- cmake/OpenMPTesting.cmake
+++ cmake/OpenMPTesting.cmake
@@ -99,7 +99,7 @@
   # project is built which is too late for detecting the compiler...
   file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/DetectTestCompiler)
   execute_process(
-    COMMAND ${CMAKE_COMMAND} ${CMAKE_CURRENT_LIST_DIR}/DetectTestCompiler
+    COMMAND ${CMAKE_COMMAND} -G${CMAKE_GENERATOR} ${CMAKE_CURRENT_LIST_DIR}/DetectTestCompiler
       -DCMAKE_C_COMPILER=${OPENMP_TEST_C_COMPILER}
       -DCMAKE_CXX_COMPILER=${OPENMP_TEST_CXX_COMPILER}
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/DetectTestCompiler