1 files changed, 1 insertions, 1 deletions
diff --git a/src/Startup.c b/src/Startup.c
index 3cb3226..69be436 100644
--- a/src/Startup.c
+++ b/src/Startup.c
@@ -244,7 +244,7 @@ static int PUGHInterp_InterpGV (cGH *GH,
   int local_interp_handle, param_table_handle, coord_system_handle;
   char table_string[64];
   CCTK_INT *_input_array_indices, *_output_array_types;
-  struct
+  union
   {
     const cGH *const_GH;
           cGH *non_const_GH;