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-rw-r--r--src/wctype/iswupper.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/wctype/iswupper.c b/src/wctype/iswupper.c
index 7438e121..1abe4116 100644
--- a/src/wctype/iswupper.c
+++ b/src/wctype/iswupper.c
@@ -12,6 +12,8 @@ int iswupper(wint_t wc)
return iswctype(wc, upper);
}
+__check_1(int, 0, iswupper, wint_t)
+
/***
The fn(iswupper) function tests whether arg(wc) is a wide character in the class
cclass(upper) in the current locale.