diff --git a/ext/RMagick/rmilist.c b/ext/RMagick/rmilist.c
index c7f1e468d..9008a3934 100644
--- a/ext/RMagick/rmilist.c
+++ b/ext/RMagick/rmilist.c
@@ -1178,7 +1178,12 @@ ImageList_write(VALUE self, VALUE file)
 
         // Ensure file is open - raise error if not
         GetOpenFile(file, fptr);
+#if defined(_WIN32)
+        add_format_prefix(info, fptr->pathv);
+        SetImageInfoFile(info, NULL);
+#else
         SetImageInfoFile(info, GetReadFile(fptr));
+#endif
     }
     else
     {
diff --git a/ext/RMagick/rmimage.c b/ext/RMagick/rmimage.c
index 90b138b24..098e7c63a 100644
--- a/ext/RMagick/rmimage.c
+++ b/ext/RMagick/rmimage.c
@@ -14733,8 +14733,14 @@ Image_write(VALUE self, VALUE file)
         // Ensure file is open - raise error if not
         GetOpenFile(file, fptr);
         rb_io_check_writable(fptr);
+#if defined(_WIN32)
+        add_format_prefix(info, fptr->pathv);
+        strcpy(image->filename, info->filename);
+        SetImageInfoFile(info, NULL);
+#else
         SetImageInfoFile(info, GetWriteFile(fptr));
         memset(image->filename, 0, sizeof(image->filename));
+#endif
     }
     else
     {