diff --git a/src/diwa.cpp b/src/diwa.cpp
index 611f0e9..205f57b 100644
--- a/src/diwa.cpp
+++ b/src/diwa.cpp
@@ -25,14 +25,14 @@
 #   include <bootloader_random.h>
 #endif
 
-#if !defined(ARDUINO)
+#if defined(__GNUC__) || defined(__GNUG__) || defined(__clang__) || defined(_MSC_VER)
 #   include <cstring>
 #endif
 
 #include <diwa.h>
 #include <diwa_conv.h>
 
-#ifndef ARDUINO
+#if (defined(__GNUC__) || defined(__GNUG__) || defined(__clang__) || defined(_MSC_VER)) && !defined(PSP)
 
 static inline void writeToStream(std::ofstream& stream, const uint8_t* data, size_t size) {
     for(size_t i = 0; i < size; i++)
@@ -375,7 +375,7 @@ DiwaError Diwa::saveToFile(File annFile) {
     return NO_ERROR;
 }
 
-#else
+#elif (defined(__GNUC__) || defined(__GNUG__) || defined(__clang__) || defined(_MSC_VER)) && !defined(PSP)
 
 DiwaError Diwa::loadFromFile(std::ifstream& annFile) {
     if(!annFile.is_open())
diff --git a/src/diwa.h b/src/diwa.h
index fb6e17c..f601e61 100644
--- a/src/diwa.h
+++ b/src/diwa.h
@@ -48,13 +48,15 @@
 #   else
 #       include <SD.h>
 #   endif
-#else
+#elif (defined(__GNUC__) || defined(__GNUG__) || defined(__clang__) || defined(_MSC_VER)) && !defined(PSP)
 #   include <fstream>
-#   include <stdint.h>
+#   include <math.h>
+#elif defined(PSP)
+#   include <pspmath.h>
 #endif
 
 #include <diwa_activations.h>
-#include <math.h>
+#include <stdint.h>
 
 /**
  * @enum DiwaError
@@ -243,7 +245,7 @@ class Diwa final {
      */
     DiwaError saveToFile(File annFile);
 
-    #else
+    #elif (defined(__GNUC__) || defined(__GNUG__) || defined(__clang__) || defined(_MSC_VER)) && !defined(PSP)
 
     /**
      * @brief Load neural network model from file in non-Arduino environment.
diff --git a/src/diwa_conv.h b/src/diwa_conv.h
index 89310f7..3327282 100644
--- a/src/diwa_conv.h
+++ b/src/diwa_conv.h
@@ -34,6 +34,8 @@
 #ifndef DIWA_UTIL_H
 #define DIWA_UTIL_H
 
+#include <stdint.h>
+
 /** @cond */
 typedef union {
     double d;