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-rw-r--r--src/u8c/isalnum.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/u8c/isalnum.c b/src/u8c/isalnum.c
index d2ab013..ae2e4c8 100644
--- a/src/u8c/isalnum.c
+++ b/src/u8c/isalnum.c
@@ -19,7 +19,7 @@
# include <u8c/isalnum.h>
# include <u8c/isalpha.h>
# include <u8c/isdigit.h>
-uint_least8_t u8c_isalnum(uint_least8_t * const _res,uint_least32_t _chr) {
+uint_least8_t u8c_isalnum(uint_least8_t * const _res,uint_least32_t const _chr) {
assert(_res != NULL);
uint_least8_t res = UINT8_C(0x0);
u8c_isalpha(&res,_chr);