diff --git a/src/Mod/Fem/FemInputWriterZ88.py b/src/Mod/Fem/FemInputWriterZ88.py
index 87d76cacb..65a1b8fdc 100644
--- a/src/Mod/Fem/FemInputWriterZ88.py
+++ b/src/Mod/Fem/FemInputWriterZ88.py
@@ -41,7 +41,7 @@ class FemInputWriterZ88(FemInputWriter.FemInputWriter):
                  contact_obj, planerotation_obj, transform_obj,
                  selfweight_obj, force_obj, pressure_obj,
                  temperature_obj, heatflux_obj, initialtemperature_obj,
-                 beamsection_obj, shellthickness_obj,
+                 beamsection_obj, shellthickness_obj, fluidsection_obj,
                  analysis_type=None, dir_name=None
                  ):
 
@@ -53,7 +53,7 @@ class FemInputWriterZ88(FemInputWriter.FemInputWriter):
             contact_obj, planerotation_obj, transform_obj,
             selfweight_obj, force_obj, pressure_obj,
             temperature_obj, heatflux_obj, initialtemperature_obj,
-            beamsection_obj, shellthickness_obj,
+            beamsection_obj, shellthickness_obj, fluidsection_obj,
             analysis_type, dir_name)
         self.file_name = self.dir_name + '/z88'
         print('FemInputWriterZ88 --> self.dir_name  -->  ' + self.dir_name)
diff --git a/src/Mod/Fem/FemToolsZ88.py b/src/Mod/Fem/FemToolsZ88.py
index 1c697c4e6..732c1d995 100644
--- a/src/Mod/Fem/FemToolsZ88.py
+++ b/src/Mod/Fem/FemToolsZ88.py
@@ -89,7 +89,7 @@ class FemToolsZ88(FemTools.FemTools):
                 self.contact_constraints, self.planerotation_constraints, self.transform_constraints,
                 self.selfweight_constraints, self.force_constraints, self.pressure_constraints,
                 self.temperature_constraints, self.heatflux_constraints, self.initialtemperature_constraints,
-                self.beam_sections, self.shell_thicknesses,
+                self.beam_sections, self.shell_thicknesses, self.fluid_sections,
                 self.analysis_type, self.working_dir)
             self.inp_file_name = inp_writer.write_z88_input()
         except: