diff --git a/libcxx/test/libcxx/strings/basic.string/string.capacity/max_size.pass.cpp b/libcxx/test/libcxx/strings/basic.string/string.capacity/max_size.pass.cpp
index 0468e785ec7a8..bb9eddb59526a 100644
--- a/libcxx/test/libcxx/strings/basic.string/string.capacity/max_size.pass.cpp
+++ b/libcxx/test/libcxx/strings/basic.string/string.capacity/max_size.pass.cpp
@@ -80,6 +80,8 @@ bool test() {
 #   endif
 # elif defined(__powerpc__) || defined(__powerpc64__)
   half_size();
+# elif defined(_WIN32)
+  full_size();
 # else
 #   error "Your target system seems to be unsupported."
 # endif