diff --git a/src/extlib/ib_udf2.sql b/src/extlib/ib_udf2.sql
index 1e231c8cd5..93e4244f05 100644
--- a/src/extlib/ib_udf2.sql
+++ b/src/extlib/ib_udf2.sql
@@ -377,7 +377,7 @@ DECLARE EXTERNAL FUNCTION log10
  *	INTERBASE character string.
  *
  *****************************************/
-DECLARE EXTERNAL FUNCTION lower 
+DECLARE EXTERNAL FUNCTION "LOWER"
 	CSTRING(255) NULL
 	RETURNS CSTRING(255) FREE_IT
 	ENTRY_POINT 'IB_UDF_lower' MODULE_NAME 'ib_udf';