diff --git a/src/Umbraco.Web.UI/config/log4net.Release.config b/src/Umbraco.Web.UI/config/log4net.Release.config
index 54a0e23ab2..d77e3f9c0d 100644
--- a/src/Umbraco.Web.UI/config/log4net.Release.config
+++ b/src/Umbraco.Web.UI/config/log4net.Release.config
@@ -11,7 +11,7 @@
     <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
     <appendToFile value="true" />
     <rollingStyle value="Composite" />
-    <datePattern value=".yyyy-MM-dd"/>
+    <datePattern value=".yyyy-MM-dd.'log'"/>
     <maximumFileSize value="5MB" />
     <layout type="log4net.Layout.PatternLayout">
       <conversionPattern value=" %date [P%property{processId}/D%property{appDomainId}/T%thread] %-5level %logger - %message%newline" />
diff --git a/src/Umbraco.Web.UI/config/log4net.config b/src/Umbraco.Web.UI/config/log4net.config
index 382f886adc..28d454165d 100644
--- a/src/Umbraco.Web.UI/config/log4net.config
+++ b/src/Umbraco.Web.UI/config/log4net.config
@@ -11,7 +11,7 @@
     <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
     <appendToFile value="true" />
      <rollingStyle value="Composite" />
-     <datePattern value=".yyyy-MM-dd"/>
+     <datePattern value=".yyyy-MM-dd.'log'"/>
     <maximumFileSize value="5MB" />
     <layout type="log4net.Layout.PatternLayout">
       <conversionPattern value=" %date [P%property{processId}/D%property{appDomainId}/T%thread] %-5level %logger - %message%newline" />