diff --git a/src/raylib.h b/src/raylib.h
index 94e79a5f7..07b64aeb6 100644
--- a/src/raylib.h
+++ b/src/raylib.h
@@ -918,8 +918,8 @@ typedef enum {
 // Callbacks to hook some internal functions
 // WARNING: These callbacks are intended for advance users
 typedef void (*TraceLogCallback)(int logLevel, const char *text, va_list args);  // Logging: Redirect trace log messages
-typedef unsigned char *(*LoadFileDataCallback)(const char *fileName, unsigned int *bytesRead);      // FileIO: Load binary data
-typedef bool (*SaveFileDataCallback)(const char *fileName, void *data, unsigned int bytesToWrite);  // FileIO: Save binary data
+typedef unsigned char *(*LoadFileDataCallback)(const char *fileName, int *dataSize);    // FileIO: Load binary data
+typedef bool (*SaveFileDataCallback)(const char *fileName, void *data, int dataSize);   // FileIO: Save binary data
 typedef char *(*LoadFileTextCallback)(const char *fileName);            // FileIO: Load text data
 typedef bool (*SaveFileTextCallback)(const char *fileName, char *text); // FileIO: Save text data