diff --git a/lib/MySQL_Thread.cpp b/lib/MySQL_Thread.cpp
index 8e0206f721..81181c680d 100644
--- a/lib/MySQL_Thread.cpp
+++ b/lib/MySQL_Thread.cpp
@@ -2542,7 +2542,7 @@ bool MySQL_Thread::init() {
 	match_regexes[0]=new Session_Regex((char *)"^SET (|SESSION |@@|@@session.)SQL_LOG_BIN( *)(:|)=( *)");
 
 	std::stringstream ss;
-	ss << "^SET (|SESSION |@@|@@session.)(" << mysql_variables.variables_regexp << "SESSION_TRACK_GTIDS|TX_ISOLATION( *)(:|)=( *))";
+	ss << "^SET (|SESSION |@@|@@session.)(" << mysql_variables.variables_regexp << "SESSION_TRACK_GTIDS|TX_ISOLATION)( *)(:|)=( *)";
 	match_regexes[1]=new Session_Regex((char *)ss.str().c_str());
 
 	match_regexes[2]=new Session_Regex((char *)"^SET(?: +)(|SESSION +)TRANSACTION(?: +)(?:(?:(ISOLATION(?: +)LEVEL)(?: +)(REPEATABLE(?: +)READ|READ(?: +)COMMITTED|READ(?: +)UNCOMMITTED|SERIALIZABLE))|(?:(READ)(?: +)(WRITE|ONLY)))");