diff --git a/src/dynamics/mpas/dyn_comp.F90 b/src/dynamics/mpas/dyn_comp.F90
index 4c8e15a2..5e686f25 100644
--- a/src/dynamics/mpas/dyn_comp.F90
+++ b/src/dynamics/mpas/dyn_comp.F90
@@ -264,12 +264,12 @@ subroutine dyn_init(cam_runtime_opts, dyn_in, dyn_out)
         call dyn_debug_print(debugout_debug, 'thermodynamic_active_species_ice_num = ' // &
             stringify([thermodynamic_active_species_ice_num]))
 
-        call dyn_debug_print(debugout_debug, 'thermodynamic_active_species_idx_dycore = ' // &
-            stringify(thermodynamic_active_species_idx_dycore))
-        call dyn_debug_print(debugout_debug, 'thermodynamic_active_species_liq_idx_dycore = ' // &
-            stringify(thermodynamic_active_species_liq_idx_dycore))
-        call dyn_debug_print(debugout_debug, 'thermodynamic_active_species_ice_idx_dycore = ' // &
-            stringify(thermodynamic_active_species_ice_idx_dycore))
+        call dyn_debug_print(debugout_debug, 'thermodynamic_active_species_idx_dycore = [' // &
+            stringify(thermodynamic_active_species_idx_dycore) // ']')
+        call dyn_debug_print(debugout_debug, 'thermodynamic_active_species_liq_idx_dycore = [' // &
+            stringify(thermodynamic_active_species_liq_idx_dycore) // ']')
+        call dyn_debug_print(debugout_debug, 'thermodynamic_active_species_ice_idx_dycore = [' // &
+            stringify(thermodynamic_active_species_ice_idx_dycore) // ']')
 
         pio_init_file => initial_file_get_id()
         pio_topo_file => topo_file_get_id()