diff --git a/src/Mod/Fem/FemInputWriterCcx.py b/src/Mod/Fem/FemInputWriterCcx.py
index 3d43b2d5f..d7331dead 100644
--- a/src/Mod/Fem/FemInputWriterCcx.py
+++ b/src/Mod/Fem/FemInputWriterCcx.py
@@ -817,7 +817,7 @@ class FemInputWriterCcx(FemInputWriter.FemInputWriter):
                 f.write('\n')
             elif fixedtemp_obj.ConstraintType == "CFlux":
                 f.write('*CFLUX\n')
-                f.write('{},11,{}\n'.format(fixedtemp_obj.Name, fixedtemp_obj.CFlux / NumberOfNodes))
+                f.write('{},11,{}\n'.format(fixedtemp_obj.Name, fixedtemp_obj.CFlux * 0.001 / NumberOfNodes))
                 f.write('\n')
 
     def write_constraints_heatflux(self, f):
@@ -845,7 +845,7 @@ class FemInputWriterCcx(FemInputWriter.FemInputWriter):
                             v = self.mesh_object.FemMesh.getccxVolumesByFace(ho)
                             f.write("** Heat flux on face {}\n".format(elem))
                             for i in v:
-                                f.write("{},S{},{}\n".format(i[0], i[1], heatflux_obj.DFlux))
+                                f.write("{},S{},{}\n".format(i[0], i[1], heatflux_obj.DFlux * 0.001))
 
     def write_outputs_types(self, f):
         f.write('\n***********************************************************\n')