diff --git a/modules/mol/alg/pymod/ligand_scoring.py b/modules/mol/alg/pymod/ligand_scoring.py
index f37f996c9cb86cc303adff5d3567c3c04a8a1a6d..878fd53394373360633b6c3f841a07e6e7f9e050 100644
--- a/modules/mol/alg/pymod/ligand_scoring.py
+++ b/modules/mol/alg/pymod/ligand_scoring.py
@@ -757,7 +757,7 @@ def SCRMSD(model_ligand, target_ligand, transformation=geom.Mat4(),
                                     substructure_match=substructure_match,
                                     by_atom_index=True)
 
-    best_rmsd = float('inf')
+    best_rmsd = np.inf
     for i, (trg_sym, mdl_sym) in enumerate(symmetries):
         # Prepare Entities for RMSD
         trg_lig_rmsd_ent = mol.CreateEntity()