diff --git a/include/stdlib.h b/include/stdlib.h
index 56bb1566d58e..b2fc90934f85 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -304,7 +304,7 @@ int	 radixsort(const unsigned char **, int, const unsigned char *,
 	    unsigned);
 void	*reallocarray(void *, size_t, size_t) __result_use_check __alloc_size(2)
 	    __alloc_size(3);
-void	*reallocf(void *, size_t) __alloc_size(2);
+void	*reallocf(void *, size_t) __result_use_check __alloc_size(2);
 int	 rpmatch(const char *);
 void	 setprogname(const char *);
 int	 sradixsort(const unsigned char **, int, const unsigned char *,