diff --git a/modulus/datapipes/healpix/data_modules.py b/modulus/datapipes/healpix/data_modules.py
index 50f7284ba..4c4b48968 100644
--- a/modulus/datapipes/healpix/data_modules.py
+++ b/modulus/datapipes/healpix/data_modules.py
@@ -989,7 +989,7 @@ def setup(self) -> None:
                 )
 
                 dataset = dataset.sel(
-                    channel_in=self.input_variables,
+                    channel_in=self.input_variables + coupled_variables,
                     channel_out=self.output_variables,
                 )
             else: