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-rw-r--r--src/cmark_ctype.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/cmark_ctype.h b/src/cmark_ctype.h
index f803946..9a07618 100644
--- a/src/cmark_ctype.h
+++ b/src/cmark_ctype.h
@@ -17,6 +17,8 @@ int cmark_isalnum(char c);
int cmark_isdigit(char c);
+int cmark_isalpha(char c);
+
#ifdef __cplusplus
}
#endif