diff --git a/include/lib/libc/stdlib.h b/include/lib/libc/stdlib.h
index cf30ef3..71bb4ba 100644
--- a/include/lib/libc/stdlib.h
+++ b/include/lib/libc/stdlib.h
@@ -30,5 +30,5 @@
 long long strtoll(const char *nptr, char **endptr, int base);
 unsigned long long strtoull(const char *nptr, char **endptr, int base);
 void qsort(void *, size_t, size_t,
-           int (* _Nonnull)(const void *, const void *));
+           int (*)(const void *, const void *));
 #endif /* STDLIB_H */