diff --git a/DB/src/main/java/io/deephaven/db/tables/lang/DBLanguageParser.java b/DB/src/main/java/io/deephaven/db/tables/lang/DBLanguageParser.java
index dccc4c34967..4292cd7a873 100644
--- a/DB/src/main/java/io/deephaven/db/tables/lang/DBLanguageParser.java
+++ b/DB/src/main/java/io/deephaven/db/tables/lang/DBLanguageParser.java
@@ -1178,7 +1178,7 @@ else if (fromBoxedType) {
         if (toPrimitive && !ret.equals(boolean.class) && !ret.equals(exprType)) {
             // Casting to a primitive, except booleans and the identity conversion
             printer.append(ret.getSimpleName());
-            if (isAssignableFrom(PyObject.class, exprType)) {
+            if (exprType != NULL_CLASS && isAssignableFrom(PyObject.class, exprType)) {
                 printer.append("PyCast((PyObject)");
             } else {
                 printer.append("Cast(");