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-rw-r--r--doc/helper_headers.rst1
1 files changed, 1 insertions, 0 deletions
diff --git a/doc/helper_headers.rst b/doc/helper_headers.rst
index 7b4c083..05ded38 100644
--- a/doc/helper_headers.rst
+++ b/doc/helper_headers.rst
@@ -30,6 +30,7 @@ that there is a good reason to do so in the first place.
bool HX_isalnum(unsigned char c);
bool HX_isalpha(unsigned char c);
+ bool HX_isascii(unsigned char c);
bool HX_isdigit(unsigned char c);
bool HX_islower(unsigned char c);
bool HX_isprint(unsigned char c);