diff --git a/LDK/api-src/org/labkey/api/ldk/table/ContainerScopedTable.java b/LDK/api-src/org/labkey/api/ldk/table/ContainerScopedTable.java
index 696c81f0..40a1e3be 100644
--- a/LDK/api-src/org/labkey/api/ldk/table/ContainerScopedTable.java
+++ b/LDK/api-src/org/labkey/api/ldk/table/ContainerScopedTable.java
@@ -320,7 +320,7 @@ public boolean rowExists(Container c, Object key)
             ColumnInfo pkCol = getColumn(FieldKey.fromString(_pseudoPk));
             try
             {
-                key = ConvertHelper.convert(key, pkCol.getJavaClass());
+                key = pkCol.convert(key);
             }
             catch (ConversionException e)
             {
diff --git a/laboratory/api-src/org/labkey/api/laboratory/assay/DefaultAssayParser.java b/laboratory/api-src/org/labkey/api/laboratory/assay/DefaultAssayParser.java
index c7bdf324..98ceb3ae 100644
--- a/laboratory/api-src/org/labkey/api/laboratory/assay/DefaultAssayParser.java
+++ b/laboratory/api-src/org/labkey/api/laboratory/assay/DefaultAssayParser.java
@@ -258,7 +258,7 @@ protected void performDefaultChecks(List<Map<String, Object>> rows, ImportContex
 
                     try
                     {
-                        ConvertHelper.convert(row.get(name), pd.getJavaClass());
+                        pd.convert(row.get(name));
                     }
                     catch (ConversionException e)
                     {