1 files changed, 1 insertions, 1 deletions
diff --git a/libcxx/test/std/containers/sequences/deque/deque.modifiers/pop_front.pass.cpp b/libcxx/test/std/containers/sequences/deque/deque.modifiers/pop_front.pass.cpp
index 0dff181baca..3de5586ab92 100644
--- a/libcxx/test/std/containers/sequences/deque/deque.modifiers/pop_front.pass.cpp
+++ b/libcxx/test/std/containers/sequences/deque/deque.modifiers/pop_front.pass.cpp
@@ -47,7 +47,7 @@ test(C& c1)
     std::size_t c1_osize = c1.size();
     c1.pop_front();
     assert(c1.size() == c1_osize - 1);
-    assert(distance(c1.begin(), c1.end()) == c1.size());
+    assert(static_cast<std::size_t>(distance(c1.begin(), c1.end())) == c1.size());
     I i = c1.begin();
     for (int j = 1; static_cast<std::size_t>(j) < c1.size(); ++j, ++i)
         assert(*i == j);