diff --git a/SALCAfield/SALCAfield_field.py b/SALCAfield/SALCAfield_field.py
index 9eae6ae..036b5d6 100644
--- a/SALCAfield/SALCAfield_field.py
+++ b/SALCAfield/SALCAfield_field.py
@@ -858,7 +858,7 @@ def unpack_dc(dc):
     # calculate loss rate through NH3, N2O (only direct) and NOx
     loss_rate_N_frac = (e_fert_kg_NH3_N+e_direct_kgN2O_N+e_fert_kgNOx_N) / \
         fert_kgN  # [kg N/kg N]
-    min(1.0, loss_rate_N_frac)  # cannot be >1
+    loss_rate_N_frac = min(1.0, loss_rate_N_frac)  # cannot be >1
 else:
     loss_rate_N_frac = 0  # [kg N/kg N]
 
@@ -867,7 +867,7 @@ def unpack_dc(dc):
     # calculate loss rate through NH3, N2O and NOx
     loss_rate_TAN_frac = (e_fert_kg_NH3_N+e_direct_kgN2O_N+e_fert_kgNOx_N) / \
         fert_kgTAN  # [kg TAN/kg TAN]
-    min(1.0, loss_rate_TAN_frac)  # cannot be >1
+    loss_rate_TAN_frac = min(1.0, loss_rate_TAN_frac)  # cannot be >1
 else:
     loss_rate_TAN_frac = 0  # [kg TAN/kg TAN]