diff --git a/src/lib/adblock/adblockrule.cpp b/src/lib/adblock/adblockrule.cpp
index 278b07259..05a2db2ef 100644
--- a/src/lib/adblock/adblockrule.cpp
+++ b/src/lib/adblock/adblockrule.cpp
@@ -47,9 +47,9 @@
 #include "adblockrule.h"
 #include "adblocksubscription.h"
 #include "qztools.h"
+#include "qzregexp.h"
 
 #include <QDebug>
-#include "qzregexp.h"
 #include <QUrl>
 #include <QString>
 #include <QStringList>
@@ -362,6 +362,7 @@ void AdBlockRule::parseFilter()
     // Empty rule or just comment
     if (m_filter.trimmed().isEmpty() || m_filter.startsWith(QLatin1Char('!'))) {
         m_isEnabled = false;
+        m_type = Invalid;
         return;
     }
 
@@ -445,6 +446,7 @@ void AdBlockRule::parseFilter()
         // If we don't handle all options, it's safer to just disable this rule
         if (handledOptions != options.count()) {
             m_isInternalDisabled = true;
+            m_type = Invalid;
             return;
         }
 
diff --git a/src/lib/adblock/adblockrule.h b/src/lib/adblock/adblockrule.h
index 5ea2c952d..4fc0b22aa 100644
--- a/src/lib/adblock/adblockrule.h
+++ b/src/lib/adblock/adblockrule.h
@@ -106,7 +106,8 @@ private:
         DomainMatchRule = 1,
         RegExpMatchRule = 2,
         StringEndsMatchRule = 3,
-        StringContainsMatchRule = 4
+        StringContainsMatchRule = 4,
+        Invalid = 5
     };
 
     enum RuleOption {
@@ -153,6 +154,8 @@ private:
 
     QStringList m_allowedDomains;
     QStringList m_blockedDomains;
+
+    friend class AdBlockSearchTree;
 };
 
 #endif // ADBLOCKRULE_H