diff --git a/include/stdlib/string.h b/include/stdlib/string.h
index 221de03..00a5dcd 100644
--- a/include/stdlib/string.h
+++ b/include/stdlib/string.h
@@ -56,7 +56,9 @@
 void	*memset(void *, int, size_t);
 
 char	*strchr(const char *, int) __pure;
+int	 strcmp(const char *, const char *) __pure;
 size_t	 strlen(const char *) __pure;
+int	 strncmp(const char *, const char *, size_t) __pure;
 
 __END_DECLS