diff --git a/plugins/Full_CI_ZMQ/selection_types.f90 b/plugins/Full_CI_ZMQ/selection_types.f90
new file mode 100644
index 00000000..9506629c
--- /dev/null
+++ b/plugins/Full_CI_ZMQ/selection_types.f90
@@ -0,0 +1,9 @@
+module selection_types
+  type selection_buffer
+    integer :: N, cur
+    integer(8), allocatable :: det(:,:,:)
+    double precision, allocatable :: val(:)
+    double precision :: mini
+  endtype
+end module
+