diff -ru a/cmake/OpenCVFindLibsPerf.cmake b/cmake/OpenCVFindLibsPerf.cmake
--- a/cmake/OpenCVFindLibsPerf.cmake	2020-10-10 15:14:29.000000000 -0500
+++ b/cmake/OpenCVFindLibsPerf.cmake	2021-11-26 18:30:13.861053938 -0600
@@ -120,9 +120,7 @@
     ocv_check_modules(CLP clp)
     if(CLP_FOUND)
       set(HAVE_CLP TRUE)
-      if(NOT ${CLP_INCLUDE_DIRS} STREQUAL "")
-        ocv_include_directories(${CLP_INCLUDE_DIRS})
-      endif()
+      ocv_include_directories(${CLP_INCLUDE_DIRS})
       list(APPEND OPENCV_LINKER_LIBS ${CLP_LIBRARIES})
     endif()
   endif()