diff --git a/ext/SolidStateDetectorsLegendHDF5IOExt.jl b/ext/SolidStateDetectorsLegendHDF5IOExt.jl
index 3490003b1..64665858f 100644
--- a/ext/SolidStateDetectorsLegendHDF5IOExt.jl
+++ b/ext/SolidStateDetectorsLegendHDF5IOExt.jl
@@ -68,15 +68,24 @@ function SolidStateDetectors.simulate_waveforms( mcevents::AbstractVector{<:Name
 end
 
 
-# Add support for reading and writing CartesianPoint and CylindricalPoint using LegendHDF5IO
-function __init__()
-    LegendHDF5IO._datatype_dict["cartesianpoint"] = CartesianPoint
-    LegendHDF5IO._datatype_dict["cylindricalpoint"] = CylindricalPoint
+# Add support for reading and writing CartesianPoint and CylindricalPoint using LegendHDF5IO.
+# LegendHDF5IO v0.2 registers datatype names with `register_datatype!`, v0.1 through its
+# datatype dictionary and `datatype_to_string`:
+if isdefined(LegendHDF5IO, :register_datatype!)
+    function __init__()
+        LegendHDF5IO.register_datatype!("cartesianpoint", CartesianPoint)
+        LegendHDF5IO.register_datatype!("cylindricalpoint", CylindricalPoint)
+    end
+else
+    function __init__()
+        LegendHDF5IO._datatype_dict["cartesianpoint"] = CartesianPoint
+        LegendHDF5IO._datatype_dict["cylindricalpoint"] = CylindricalPoint
+    end
+
+    LegendHDF5IO.datatype_to_string(::Type{<:CartesianPoint}) = "cartesianpoint"
+    LegendHDF5IO.datatype_to_string(::Type{<:CylindricalPoint}) = "cylindricalpoint"
 end
 
-LegendHDF5IO.datatype_to_string(::Type{<:CartesianPoint}) = "cartesianpoint"
-LegendHDF5IO.datatype_to_string(::Type{<:CylindricalPoint}) = "cylindricalpoint"
-
 
 
 # support writing points to HDF5 file using LH5Array
diff --git a/test/Project.toml b/test/Project.toml
index 0b7a10ffc..e1eb909df 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -23,4 +23,4 @@ Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
 [compat]
 Geant4 = "0.3.1"
 LegendDataTypes = "0.1.3"
-LegendHDF5IO = "0.1"
+LegendHDF5IO = "0.1, 0.2"