diff --git a/reactos/include/psdk/winbase.h b/reactos/include/psdk/winbase.h
index 71956786c85..d8c2b9375c9 100644
--- a/reactos/include/psdk/winbase.h
+++ b/reactos/include/psdk/winbase.h
@@ -2079,7 +2079,7 @@ BOOL WINAPI MapUserPhysicalPagesScatter(PVOID*,ULONG_PTR,PULONG_PTR);
 typedef STARTUPINFOW STARTUPINFO,*LPSTARTUPINFO;
 typedef WIN32_FIND_DATAW WIN32_FIND_DATA,*LPWIN32_FIND_DATA;
 #if (_WIN32_WINNT >= 0x0501)
-typedef WIN32_FIND_STREAM_DATAW WIN32_FIND_STREAM_DATA,*LPWIN32_FIND_STREAM_DATA;
+typedef WIN32_FIND_STREAM_DATA WIN32_FIND_STREAM_DATA,*LPWIN32_FIND_STREAM_DATA;
 #endif
 typedef HW_PROFILE_INFOW HW_PROFILE_INFO,*LPHW_PROFILE_INFO;
 typedef ENUMRESLANGPROCW ENUMRESLANGPROC;