diff --git a/com.cubrid.cubridmigration.core/src/com/cubrid/cubridmigration/cubrid/CUBRIDTimeUtil.java b/com.cubrid.cubridmigration.core/src/com/cubrid/cubridmigration/cubrid/CUBRIDTimeUtil.java
index 11bb9a7d..fc6d395e 100644
--- a/com.cubrid.cubridmigration.core/src/com/cubrid/cubridmigration/cubrid/CUBRIDTimeUtil.java
+++ b/com.cubrid.cubridmigration.core/src/com/cubrid/cubridmigration/cubrid/CUBRIDTimeUtil.java
@@ -587,6 +587,10 @@ public static boolean validateDateString(String datestring, String datepattern)
      * @return boolean true: CUBRID support; false: CUBRID not support
      */
     public static boolean validateDateTimeFunction(String dateTime) {
+        if (dateTime == null) {
+            return false;
+        }
+
         String upperDateTime = dateTime.toUpperCase(Locale.US);
 
         for (String function : dateTimeFunctions) {