1 files changed, 1 insertions, 0 deletions
diff --git a/libcxx/test/input.output/file.streams/fstreams/fstream.assign/move_assign.pass.cpp b/libcxx/test/input.output/file.streams/fstreams/fstream.assign/move_assign.pass.cpp
index 09b4f7460d7..51cf41fdf71 100644
--- a/libcxx/test/input.output/file.streams/fstreams/fstream.assign/move_assign.pass.cpp
+++ b/libcxx/test/input.output/file.streams/fstreams/fstream.assign/move_assign.pass.cpp
@@ -21,6 +21,7 @@ int main()
 {
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     char temp[L_tmpnam];
+    tmpnam(temp);
     {
         std::fstream fso(temp, std::ios_base::in | std::ios_base::out
                                                  | std::ios_base::trunc);