diff --git a/lib/core/agent.py b/lib/core/agent.py
index fc2663c2a..8ba99ecb7 100644
--- a/lib/core/agent.py
+++ b/lib/core/agent.py
@@ -261,7 +261,7 @@ class Agent:
         if 'hex' in rootQuery:
             hexField = rootQuery.hex.query % field
         else:
-            warnMsg = "switch '--hex' is currently not supported on DBMS '%s'. " % Backend.getIdentifiedDbms()
+            warnMsg = "switch '--hex' is currently not supported on DBMS '%s'" % Backend.getIdentifiedDbms()
             singleTimeWarnMessage(warnMsg)
 
         return hexField
@@ -308,7 +308,7 @@ class Agent:
                 nulledCastedField = rootQuery.isnull.query % nulledCastedField
 
         if conf.hexConvert:
-            nulledCastedField = hexConvertField(nulledCastedField)
+            nulledCastedField = self.hexConvertField(nulledCastedField)
 
         return nulledCastedField