diff --git a/drivers/acpi/utilities/utcopy.c b/drivers/acpi/utilities/utcopy.c
index ba899714733b03c5903333374fa74666353a932b..4c4021d82f9903dbd6cb4ff2be290140a528ac20 100644
--- a/drivers/acpi/utilities/utcopy.c
+++ b/drivers/acpi/utilities/utcopy.c
@@ -215,6 +215,11 @@ acpi_ut_copy_isimple_to_esimple(union acpi_operand_object *internal_object,
 		/*
 		 * There is no corresponding external object type
 		 */
+		ACPI_ERROR((AE_INFO,
+			    "Unsupported object type, cannot convert to external object: %s",
+			    acpi_ut_get_type_name(ACPI_GET_OBJECT_TYPE
+						  (internal_object))));
+
 		return_ACPI_STATUS(AE_SUPPORT);
 	}
 
@@ -467,6 +472,10 @@ acpi_ut_copy_esimple_to_isimple(union acpi_object *external_object,
 	default:
 		/* All other types are not supported */
 
+		ACPI_ERROR((AE_INFO,
+			    "Unsupported object type, cannot convert to internal object: %s",
+			    acpi_ut_get_type_name(external_object->type)));
+
 		return_ACPI_STATUS(AE_SUPPORT);
 	}