Index: cmake/OpenCVFindLibsGrfmt.cmake
--- cmake/OpenCVFindLibsGrfmt.cmake.orig
+++ cmake/OpenCVFindLibsGrfmt.cmake
@@ -253,12 +253,7 @@ if(NOT HAVE_SPNG AND WITH_PNG)
     include(FindPNG)
     if(PNG_FOUND)
       include(CheckIncludeFile)
-      check_include_file("${PNG_PNG_INCLUDE_DIR}/libpng/png.h" HAVE_LIBPNG_PNG_H)
-      if(HAVE_LIBPNG_PNG_H)
-        ocv_parse_header("${PNG_PNG_INCLUDE_DIR}/libpng/png.h" PNG_VERSION_LINES PNG_LIBPNG_VER_MAJOR PNG_LIBPNG_VER_MINOR PNG_LIBPNG_VER_RELEASE)
-      else()
-        ocv_parse_header("${PNG_PNG_INCLUDE_DIR}/png.h" PNG_VERSION_LINES PNG_LIBPNG_VER_MAJOR PNG_LIBPNG_VER_MINOR PNG_LIBPNG_VER_RELEASE)
-      endif()
+      ocv_parse_header("${PNG_PNG_INCLUDE_DIR}/png.h" PNG_VERSION_LINES PNG_LIBPNG_VER_MAJOR PNG_LIBPNG_VER_MINOR PNG_LIBPNG_VER_RELEASE)
     endif()
   endif()