diff --git a/build3/cmake/FindPythonLibs.cmake b/build3/cmake/FindPythonLibs.cmake
index aa53c72fc..cebac58f4 100644
--- a/build3/cmake/FindPythonLibs.cmake
+++ b/build3/cmake/FindPythonLibs.cmake
@@ -144,7 +144,7 @@ else()
       if(_PYTHON_EXECUTABLE)
 
         EXECUTE_PROCESS(
-          COMMAND ${_PYTHON_EXECUTABLE} "${_FIND_LIB_PYTHON_PY}"
+          COMMAND "${_PYTHON_EXECUTABLE}" "${_FIND_LIB_PYTHON_PY}"
           OUTPUT_VARIABLE _PYTHON_CONFIG
           RESULT_VARIABLE _PYTHON_CONFIG_RESULT
           ERROR_QUIET)