diff --git a/Inpsyde/ruleset.xml b/Inpsyde/ruleset.xml
index 02ac2b2..cf0aa17 100644
--- a/Inpsyde/ruleset.xml
+++ b/Inpsyde/ruleset.xml
@@ -147,6 +147,11 @@
     <rule ref="Generic.CodeAnalysis.AssignmentInCondition"/>
     <rule ref="Generic.CodeAnalysis.EmptyPHPStatement"/>
     <rule ref="Generic.Formatting.SpaceAfterCast"/>
+    <rule ref="Generic.Formatting.SpaceAfterNot">
+        <properties>
+            <property name="spacing" value="0"/>
+        </properties>
+    </rule>
     <rule ref="Generic.Metrics.CyclomaticComplexity">
         <properties>
             <property name="absoluteComplexity" value="50"/>