diff --git a/SymfonyCustom/ruleset.xml b/SymfonyCustom/ruleset.xml
index da946ff..59d7e35 100755
--- a/SymfonyCustom/ruleset.xml
+++ b/SymfonyCustom/ruleset.xml
@@ -82,9 +82,4 @@
     <rule ref="Squiz.WhiteSpace.LogicalOperatorSpacing"/>
     <rule ref="Squiz.WhiteSpace.CastSpacing"/>
     <rule ref="Squiz.WhiteSpace.ObjectOperatorSpacing"/>
-    <rule ref="Generic.Strings.UnnecessaryStringConcat">
-        <properties>
-            <property name="allowMultiline" value="true"/>
-        </properties>
-    </rule>
 </ruleset>
diff --git a/docs/standards.md b/docs/standards.md
index 6c04f18..c22d121 100644
--- a/docs/standards.md
+++ b/docs/standards.md
@@ -138,16 +138,6 @@ we do not respect this rule:
 </rule>
 ```
 
-- Do not use unnecessary concat operator
-
-```
-<rule ref="Generic.Strings.UnnecessaryStringConcat">
-    <properties>
-        <property name="allowMultiline" value="true"/>
-    </properties>
-</rule>
-```
-
 ### Custom
 - Some others checks are made about array (`=>` alignments and indentation)