diff --git a/headers/posix/inttypes.h b/headers/posix/inttypes.h
index 9f2ec3dc9a..af139de94e 100644
--- a/headers/posix/inttypes.h
+++ b/headers/posix/inttypes.h
@@ -21,8 +21,8 @@ extern "C" {
 extern intmax_t		imaxabs(intmax_t num);
 extern imaxdiv_t	imaxdiv(intmax_t numer, intmax_t denom);
 
-extern intmax_t		strtoimax(const char *, char **, int);
-extern uintmax_t	strtoumax(const char *, char **, int);
+extern intmax_t		strtoimax(const char *string, char **_end, int base);
+extern uintmax_t	strtoumax(const char *string, char **_end, int base);
 //extern intmax_t		wcstoimax(const __wchar_t *, __wchar_t **, int);
 //extern uintmax_t	wcstoumax(const __wchar_t *, __wchar_t **, int);