2 files changed, 2 insertions, 2 deletions
diff --git a/lib/libc/include/string.h b/lib/libc/include/string.h
index 8ba2b4e..50981c4 100644
--- a/lib/libc/include/string.h
+++ b/lib/libc/include/string.h
@@ -42,6 +42,6 @@ int memcmp(const void *s1, const void *s2, size_t n);
 char *itoa(int64_t value, char *buf, int base);
 void *memcpy(void *dest, const void *src, size_t n);
 int strcmp(const char *s1, const char *s2);
-int atoi(char *s);
+int atoi(const char *s);
 
 #endif  /* !_STRING_H_ */
diff --git a/lib/libc/src/string/atoi.c b/lib/libc/src/string/atoi.c
index 24943da..920e561 100644
--- a/lib/libc/src/string/atoi.c
+++ b/lib/libc/src/string/atoi.c
@@ -32,7 +32,7 @@
 #define IS_DIGIT(C) ((C >= '0' && C <= '9'))
 
 int
-atoi(char *s)
+atoi(const char *s)
 {
     int n, sign;