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-rw-r--r--lib/pure/memfiles.nim5
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/pure/memfiles.nim b/lib/pure/memfiles.nim
index 97220b90b..31fefc6c8 100644
--- a/lib/pure/memfiles.nim
+++ b/lib/pure/memfiles.nim
@@ -178,8 +178,11 @@ proc open*(filename: string, mode: TFileMode = fmRead,
 
     if newFileSize != -1:
       flags = flags or O_CREAT or O_TRUNC
+      var permissions_mode = S_IRUSR or S_IWUSR
+      result.handle = open(filename, flags, permissions_mode)
+    else:
+      result.handle = open(filename, flags)
 
-    result.handle = open(filename, flags)
     if result.handle == -1:
       # XXX: errno is supposed to be set here
       # Is there an exception that wraps it?