diff --git a/libc/include/stdlib.h b/libc/include/stdlib.h
index 9fa84c1..72b554f 100644
--- a/libc/include/stdlib.h
+++ b/libc/include/stdlib.h
@@ -51,9 +51,9 @@
 extern int unsetenv(const char *);
 extern int clearenv(void);
 
-extern char *mkdtemp(char *);
-extern char *mktemp(char *);
-extern int mkstemp(char *);
+extern char* mkdtemp(char*);
+extern char* mktemp(char*) __warnattr("mktemp possibly used unsafely; consider using mkstemp");
+extern int mkstemp(char*);
 
 extern long strtol(const char *, char **, int);
 extern long long strtoll(const char *, char **, int);