diff --git a/defs.h b/defs.h
index 8f7d1fa..26afe23 100644
--- a/defs.h
+++ b/defs.h
@@ -5553,7 +5553,7 @@ uint32_t swap32(uint32_t, int);
 uint64_t swap64(uint64_t, int);
 ulong *get_cpumask_buf(void);
 int make_cpumask(char *, ulong *, int, int *);
-size_t strlcpy(char *, char *, size_t);
+size_t strlcpy(char *, const char *, size_t) __attribute__ ((__weak__));
 struct rb_node *rb_first(struct rb_root *);
 struct rb_node *rb_parent(struct rb_node *, struct rb_node *);
 struct rb_node *rb_right(struct rb_node *, struct rb_node *);
diff --git a/tools.c b/tools.c
index 392a797..0f2db10 100644
--- a/tools.c
+++ b/tools.c
@@ -6795,7 +6795,7 @@ make_cpumask_error:
  * always be NULL-terminated.
  */
 size_t 
-strlcpy(char *dest, char *src, size_t size)
+strlcpy(char *dest, const char *src, size_t size)
 {
 	size_t ret = strlen(src);