1 files changed, 2 insertions, 1 deletions
diff --git a/test/std/numerics/numarray/valarray.nonmembers/valarray.binary/plus_valarray_valarray.pass.cpp b/test/std/numerics/numarray/valarray.nonmembers/valarray.binary/plus_valarray_valarray.pass.cpp
index 1167772aff6a..82ebebaa7b17 100644
--- a/test/std/numerics/numarray/valarray.nonmembers/valarray.binary/plus_valarray_valarray.pass.cpp
+++ b/test/std/numerics/numarray/valarray.nonmembers/valarray.binary/plus_valarray_valarray.pass.cpp
@@ -15,6 +15,7 @@
 
 #include <valarray>
 #include <cassert>
+#include <cstddef>
 
 int main()
 {
@@ -29,7 +30,7 @@ int main()
         std::valarray<T> v3 = v1 + v2;
         assert(v1.size() == v2.size());
         assert(v1.size() == v3.size());
-        for (int i = 0; i < v1.size(); ++i)
+        for (std::size_t i = 0; i < v1.size(); ++i)
             assert(v3[i] == a3[i]);
     }
 }