1 files changed, 2 insertions, 1 deletions
diff --git a/test/std/numerics/rand/rand.dis/rand.dist.pois/rand.dist.pois.exp/eval_param.pass.cpp b/test/std/numerics/rand/rand.dis/rand.dist.pois/rand.dist.pois.exp/eval_param.pass.cpp
index e7de18fdb434..465f5a70a655 100644
--- a/test/std/numerics/rand/rand.dis/rand.dist.pois/rand.dist.pois.exp/eval_param.pass.cpp
+++ b/test/std/numerics/rand/rand.dis/rand.dist.pois/rand.dist.pois.exp/eval_param.pass.cpp
@@ -20,6 +20,7 @@
 #include <cassert>
 #include <vector>
 #include <numeric>
+#include <cstddef>
 
 template <class T>
 inline
@@ -50,7 +51,7 @@ int main()
         double var = 0;
         double skew = 0;
         double kurtosis = 0;
-        for (int i = 0; i < u.size(); ++i)
+        for (std::size_t i = 0; i < u.size(); ++i)
         {
             double dbl = (u[i] - mean);
             double d2 = sqr(dbl);