diff --git a/gprMax/fields_outputs.py b/gprMax/fields_outputs.py
index c70167ba..c60cf3b5 100644
--- a/gprMax/fields_outputs.py
+++ b/gprMax/fields_outputs.py
@@ -89,12 +89,11 @@ __global__ void store_outputs(int NRX, int iteration, const int* __restrict__ rx
 """)
 
 
-def write_hdf5_outputfile(outputfile, Ex, Ey, Ez, Hx, Hy, Hz, G):
+def write_hdf5_outputfile(outputfile, G):
     """Write an output file in HDF5 format.
 
     Args:
         outputfile (str): Name of the output file.
-        Ex, Ey, Ez, Hx, Hy, Hz (memory view): Current electric and magnetic field values.
         G (class): Grid class instance - holds essential parameters describing the model.
     """
 
diff --git a/gprMax/model_build_run.py b/gprMax/model_build_run.py
index dde372b1..451239ee 100644
--- a/gprMax/model_build_run.py
+++ b/gprMax/model_build_run.py
@@ -373,7 +373,7 @@ def run_model(args, currentmodelrun, modelend, numbermodelruns, inputfile, usern
             tsolve, memsolve = solve_gpu(currentmodelrun, modelend, G)
 
         # Write an output file in HDF5 format
-        write_hdf5_outputfile(outputfile, G.Ex, G.Ey, G.Ez, G.Hx, G.Hy, G.Hz, G)
+        write_hdf5_outputfile(outputfile, G)
 
         # Write any snapshots to file
         if G.snapshots: