diff --git a/dlls/wininet/ftp.c b/dlls/wininet/ftp.c
index 1d8a8f96c33..1736ad5abf4 100644
--- a/dlls/wininet/ftp.c
+++ b/dlls/wininet/ftp.c
@@ -1308,7 +1308,7 @@ static const object_vtbl_t FTPFILEVtbl = {
  *    NULL on failure
  *
  */
-HINTERNET FTP_FtpOpenFileW(ftp_session_t *lpwfs,
+static HINTERNET FTP_FtpOpenFileW(ftp_session_t *lpwfs,
 	LPCWSTR lpszFileName, DWORD fdwAccess, DWORD dwFlags,
 	DWORD_PTR dwContext)
 {