diff --git a/cmake/OpenCVConfig.cmake b/cmake/OpenCVConfig.cmake
index dfd7e8f268..b69b60ff5b 100644
--- a/cmake/OpenCVConfig.cmake
+++ b/cmake/OpenCVConfig.cmake
@@ -87,7 +87,7 @@ elseif(MINGW)
   set(OpenCV_RUNTIME mingw)
 
   execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpmachine
-                  OUTPUT_VARIABLE OPENCV_GCC_TARGET_MACHINE
+                  OUTPUT_VARIABLE CMAKE_OPENCV_GCC_TARGET_MACHINE
                   OUTPUT_STRIP_TRAILING_WHITESPACE)
   if(CMAKE_OPENCV_GCC_TARGET_MACHINE MATCHES "64")
     set(MINGW64 1)