diff --git a/libstdc++-v3/include/bits/atomic_wait.h b/libstdc++-v3/include/bits/atomic_wait.h
index aaf36832ea3b5e81ec65af0a16901772ce4ad909..fc840578c22162f268a06a695231cabf5c99c69e 100644
--- a/libstdc++-v3/include/bits/atomic_wait.h
+++ b/libstdc++-v3/include/bits/atomic_wait.h
@@ -34,7 +34,7 @@
 
 #include <bits/c++config.h>
 #if defined _GLIBCXX_HAS_GTHREADS || defined _GLIBCXX_HAVE_LINUX_FUTEX
-#include <stdint.h>
+#include <cstdint>
 #include <bits/functional_hash.h>
 #include <bits/gthr.h>
 #include <ext/numeric_traits.h>