diff --git a/src/definefs.hpp b/src/definefs.hpp
new file mode 100644
index 0000000..e9cb4af
--- /dev/null
+++ b/src/definefs.hpp
@@ -0,0 +1,20 @@
+#pragma once
+#ifndef USEDFS
+# if defined(ESP32)
+#  ifdef USE_LITTLEFS
+#   if ESP_IDF_VERSION_MAJOR < 4
+#    include <LITTLEFS.h>
+#    define USEDFS LITTLEFS
+#   else
+#    include <LittleFS.h>
+#    define USEDFS LittleFS
+#   endif
+#  else
+#   include <SPIFFS.h>
+#   define USEDFS SPIFFS
+#  endif
+# else
+#  include <LittleFS.h>
+#  define USEDFS LittleFS
+# endif
+#endif
diff --git a/src/sysvars.hpp b/src/sysvars.hpp
index 6fd48c3..972d8c2 100644
--- a/src/sysvars.hpp
+++ b/src/sysvars.hpp
@@ -8,26 +8,7 @@
 #include <Arduino.h>
 #include <ArduinoJson.h>
 #include <FS.h>
-// TODO: predelat na definefs.hpp, ale to pak vytvori zavislost na ESPFoundation :-(
-#ifndef USEDFS
-# if defined(ESP32)
-#  ifdef USE_LITTLEFS
-#   if ESP_IDF_VERSION_MAJOR < 4
-#    include <LITTLEFS.h>
-#    define USEDFS LITTLEFS
-#   else
-#    include <LittleFS.h>
-#    define USEDFS LittleFS
-#   endif
-#  else
-#   include <SPIFFS.h>
-#   define USEDFS SPIFFS
-#  endif
-# else
-#  include <LittleFS.h>
-#  define USEDFS LittleFS
-# endif
-#endif
+#include "definefs.hpp"
 
 enum {
     SV_OK = 0,