diff --git a/src/data/cmudict.jl b/src/data/cmudict.jl
index 2a26b691..b3257734 100644
--- a/src/data/cmudict.jl
+++ b/src/data/cmudict.jl
@@ -40,7 +40,7 @@ function rawdict()
        filter(!isempty, split.(split(readstring(deps("cmudict", "cmudict")), "\n"))))
 end
 
-validword(s) = ismatch(r"^[\w\-\.]+$", s)
+validword(s) = isascii(s) && ismatch(r"^[\w\-\.]+$", s)
 
 cmudict() = filter((s, ps) -> validword(s), rawdict())