diff --git a/sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuOverrides.scala b/sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuOverrides.scala
index 825b7c4a2df..34f8134a0b8 100644
--- a/sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuOverrides.scala
+++ b/sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuOverrides.scala
@@ -3600,10 +3600,10 @@ object GpuOverrides extends Logging {
         TypeSig.STRING,
         Seq(ParamCheck("struct",
           (TypeSig.BOOLEAN + TypeSig.STRING + TypeSig.integral + TypeSig.FLOAT +
-            TypeSig.DECIMAL_64 + TypeSig.DECIMAL_128 +
+            TypeSig.DECIMAL_128 +
             TypeSig.DOUBLE + TypeSig.STRUCT + TypeSig.ARRAY + TypeSig.MAP).nested(),
           (TypeSig.BOOLEAN + TypeSig.STRING + TypeSig.integral + TypeSig.FLOAT +
-            TypeSig.DECIMAL_64 + TypeSig.DECIMAL_128 +
+            TypeSig.DECIMAL_128 +
             TypeSig.DOUBLE + TypeSig.STRUCT + TypeSig.ARRAY + TypeSig.MAP).nested()
         ))),
       (a, conf, p, r) => new UnaryExprMeta[StructsToJson](a, conf, p, r) {