diff --git a/src/main/java/com/palnet/biz/api/ctr/cntrl/service/CtrCntrlService.java b/src/main/java/com/palnet/biz/api/ctr/cntrl/service/CtrCntrlService.java
index 1344887..b9af34a 100644
--- a/src/main/java/com/palnet/biz/api/ctr/cntrl/service/CtrCntrlService.java
+++ b/src/main/java/com/palnet/biz/api/ctr/cntrl/service/CtrCntrlService.java
@@ -105,7 +105,10 @@ public class CtrCntrlService {
 		
 		List<CtrCntrlHstryArea> areaList = query.detailArea(controlId);
 		String stAreaNm = "";
-		result.setHpno(EncryptUtils.decrypt(result.getHpno()));
+
+		if (!result.getHpno().isEmpty()) {
+			result.setHpno(EncryptUtils.decrypt(result.getHpno()));
+		}
 		
 		for(CtrCntrlHstryArea data : areaList) {
 			if(data.getActnType().equals("01")) {