diff --git a/lib/curlx/fopen.c b/lib/curlx/fopen.c
index 035632af4b..e9eb6df3b0 100644
--- a/lib/curlx/fopen.c
+++ b/lib/curlx/fopen.c
@@ -348,7 +348,7 @@ FILE *curlx_win32_fopen(const char *filename, const char *mode)
       target = fixed;
     else
       target = filename_w;
-    errno = _wfopen_s(&result, target, mode_w);
+    result = _wfsopen(target, mode_w, _SH_DENYNO);
   }
   else
     /* !checksrc! disable ERRNOVAR 1 */
@@ -360,7 +360,7 @@ FILE *curlx_win32_fopen(const char *filename, const char *mode)
     target = fixed;
   else
     target = filename;
-  errno = fopen_s(&result, target, mode);
+  result = _fsopen(target, mode, _SH_DENYNO);
 #endif
 
   CURLX_FREE(fixed);