diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index d803b14..a9c6d11 100755
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -106,7 +106,7 @@ distribution.
 #elif defined(__APPLE__)
 	#define TIXML_FSEEK fseeko
 	#define TIXML_FTELL ftello
-#elif defined(__x86_64__)
+#elif defined(__unix__) && defined(__x86_64__)
 	#define TIXML_FSEEK fseeko64
 	#define TIXML_FTELL ftello64
 #else