diff --git a/src/nomad_simulations/schema_packages/basis_set.py b/src/nomad_simulations/schema_packages/basis_set.py
index f2e68a8e..39079686 100644
--- a/src/nomad_simulations/schema_packages/basis_set.py
+++ b/src/nomad_simulations/schema_packages/basis_set.py
@@ -238,7 +238,7 @@ class AtomCenteredFunction(ArchiveSection):
     )
 
     point_charge = Quantity(
-        type=np.int32,
+        type=np.float32,
         description="""
         the value of the point charge.
         """,