1 files changed, 2 insertions, 1 deletions
diff --git a/libcxx/test/std/containers/sequences/deque/deque.modifiers/pop_back.pass.cpp b/libcxx/test/std/containers/sequences/deque/deque.modifiers/pop_back.pass.cpp
index aeb62c9d996..6efbbd4083b 100644
--- a/libcxx/test/std/containers/sequences/deque/deque.modifiers/pop_back.pass.cpp
+++ b/libcxx/test/std/containers/sequences/deque/deque.modifiers/pop_back.pass.cpp
@@ -13,6 +13,7 @@
 
 #include <deque>
 #include <cassert>
+#include <cstddef>
 
 #include "min_allocator.h"
 
@@ -48,7 +49,7 @@ test(C& c1)
     assert(c1.size() == c1_osize - 1);
     assert(distance(c1.begin(), c1.end()) == c1.size());
     I i = c1.begin();
-    for (int j = 0; j < c1.size(); ++j, ++i)
+    for (int j = 0; static_cast<std::size_t>(j) < c1.size(); ++j, ++i)
         assert(*i == j);
 }