diff --git a/pybind_interface/cuda/pybind_main_cuda.cpp b/pybind_interface/cuda/pybind_main_cuda.cpp
index 57b0ba84..74801408 100644
--- a/pybind_interface/cuda/pybind_main_cuda.cpp
+++ b/pybind_interface/cuda/pybind_main_cuda.cpp
@@ -27,8 +27,10 @@ namespace qsim {
       unsigned num_sim_threads,
       unsigned num_state_threads,
       unsigned num_dblocks
-    ) : ss_params{num_state_threads, num_dblocks} {}
-
+    ) {
+      ss_params.num_threads = num_state_threads;
+      ss_params.num_dblocks = num_dblocks;
+    }
     StateSpace CreateStateSpace() const {
       return StateSpace(ss_params);
     }