diff --git a/pymatgen/io/vasp/sets.py b/pymatgen/io/vasp/sets.py
index <HASH>..<HASH> 100644
--- a/pymatgen/io/vasp/sets.py
+++ b/pymatgen/io/vasp/sets.py
@@ -2692,7 +2692,7 @@ class MVLNPTMDSet(MITMDSet):
 
         # NPT-AIMD default settings
         defaults = {
-            "IALGO": 48,
+            "ALGO": "Fast",
             "ISIF": 3,
             "LANGEVIN_GAMMA": [10] * structure.ntypesp,
             "LANGEVIN_GAMMA_L": 1,
Update MVLNPTMDSet in sets.py

Replaced the IALGO tag with ALGO as recommended in the vasp documentation <URL>