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-rw-r--r--src/settings.sml2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/settings.sml b/src/settings.sml
index f00a4853..ec05d84d 100644
--- a/src/settings.sml
+++ b/src/settings.sml
@@ -465,7 +465,7 @@ fun check f rules s =
val checkUrl = check (fn _ => true) url
-val validMime = CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"/" orelse ch = #"-" orelse ch = #".")
+val validMime = CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"/" orelse ch = #"-" orelse ch = #"." orelse ch = #"+")
val validEnv = CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"_" orelse ch = #".")
val checkMime = check validMime mime