diff --git a/src/Core.h b/src/Core.h
index 10cb299..1bbac49 100644
--- a/src/Core.h
+++ b/src/Core.h
@@ -5,12 +5,6 @@
 #include "Path.h"
 #include <string>
 
-#ifdef _WIN32
-#define JES_O_BINARY O_BINARY
-#else
-#define JES_O_BINARY 0
-#endif
-
 namespace jes
 {
     typedef Ref<std::string> StringRef;
diff --git a/src/FileReader.cc b/src/FileReader.cc
index d6c00c4..60698fc 100644
--- a/src/FileReader.cc
+++ b/src/FileReader.cc
@@ -4,6 +4,12 @@
 #include <fcntl.h>
 #include <unistd.h>
 
+#ifdef _WIN32
+#define JES_O_BINARY O_BINARY
+#else
+#define JES_O_BINARY 0
+#endif
+
 namespace jes
 {
     bool FileReader::load(const char * fname, uint8_t ** buf, size_t * size)
diff --git a/src/FileReader.h b/src/FileReader.h
index 019e046..df7200a 100644
--- a/src/FileReader.h
+++ b/src/FileReader.h
@@ -1,9 +1,8 @@
 #ifndef JES_FILEREADER_H
 #define JES_FILEREADER_H
 
-#include "Core.h"
-#include "Ref.h"
 #include <stdint.h>
+#include <stdlib.h>
 
 namespace jes
 {