diff --git a/reactos/tools/rsym/rsym.h b/reactos/tools/rsym/rsym.h
index 82261facec3..cae80e7c69a 100644
--- a/reactos/tools/rsym/rsym.h
+++ b/reactos/tools/rsym/rsym.h
@@ -45,7 +45,7 @@ typedef unsigned char UCHAR;
 typedef unsigned short WORD;
 typedef unsigned short USHORT;
 typedef unsigned long long ULONGLONG;
-#if defined(__x86_64__) && defined(unix)
+#if defined(__x86_64__) && !defined(_WIN64)
 typedef signed int LONG;
 typedef unsigned int ULONG;
 typedef unsigned int DWORD;
@@ -57,7 +57,7 @@ typedef unsigned long DWORD;
 #if defined(_WIN64)
 typedef unsigned __int64 ULONG_PTR;
 #else
-#if defined(__x86_64__) && defined(unix)
+#if defined(__x86_64__) && !defined(_WIN64)
 typedef  unsigned int  ULONG_PTR;
 #else
 typedef  unsigned long ULONG_PTR;