diff --git a/CMakeLists.txt b/CMakeLists.txt
index fe44cd2..05fd140 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -660,8 +660,7 @@ include(cmake/OpenCVModule.cmake)
 #  Detect endianness of build platform
 # ----------------------------------------------------------------------------
 
-# if not working while compiling for esp32, change the next line in 'if(IOS OR ESP32)'
-if(IOS)
+if(IOS OR ESP32)
   # test_big_endian needs try_compile, which doesn't work for iOS
   # http://public.kitware.com/Bug/view.php?id=12288
   set(WORDS_BIGENDIAN 0)
diff --git a/esp32/scripts/build_opencv_for_esp32.sh b/esp32/scripts/build_opencv_for_esp32.sh
index e1ffabd..1f3c756 100755
--- a/esp32/scripts/build_opencv_for_esp32.sh
+++ b/esp32/scripts/build_opencv_for_esp32.sh
@@ -67,7 +67,7 @@ cp $SCRIPTDIR/resources/alloc_fix.cpp ./3rdparty/ade/ade-0.1.1f/sources/ade/sour
 echo "================================================================================"
 echo "Compiling with make -j"
 echo "================================================================================"
-make -j
+make -j3
 
 ### installing in output directory ###
 echo "================================================================================"
diff --git a/modules/core/src/glob.cpp b/modules/core/src/glob.cpp
index e6edf78..17c4733 100644
--- a/modules/core/src/glob.cpp
+++ b/modules/core/src/glob.cpp
@@ -133,44 +133,10 @@ namespace
 }
 #else
 #if defined(ESP32)
+#include <sys/unistd.h>
+#include "esp_dirent.h"
 #include <sys/stat.h>
 const char dir_separators[] = "/";
-
-namespace {
-    struct dirent {
-        const char *d_name;
-    };
-
-    struct DIR {
-        dirent ent;
-
-        DIR() { }
-        ~DIR()
-        {
-            if (ent.d_name)
-                delete[] ent.d_name;
-        }
-    };
-
-    DIR* opendir(const char* path)
-    {
-        DIR* dir = new DIR;
-        dir->ent.d_name = 0;
-        // TODO implement (point the first file starting with 'path' in its name)
-        return dir;
-    }
-
-    dirent* readdir(DIR* dir)
-    {
-        // TODO: implement (point to the next file with 'path' in its name)
-        return &(dir->ent);
-    }
-
-    void closedir(DIR* dir)
-    {
-        delete dir;
-    }
-}
 #else
 # include <dirent.h>
 # include <sys/stat.h>