diff --git a/dlls/mshtml/nsiface.idl b/dlls/mshtml/nsiface.idl
index a344899..d4ab0b7 100644
--- a/dlls/mshtml/nsiface.idl
+++ b/dlls/mshtml/nsiface.idl
@@ -49,8 +49,8 @@ typedef WORD PRUint16;
typedef INT16 PRInt16;
typedef BYTE PRUint8;
typedef BOOL PRBool;
-typedef LARGE_INTEGER PRInt64;
-typedef ULARGE_INTEGER PRUint64;
+typedef LONGLONG PRInt64;
+typedef ULONGLONG PRUint64;
typedef PRUint64 DOMTimeStamp;
typedef PRUint32 nsLoadFlags;