diff --git a/core/src/main/java/lucee/runtime/functions/other/IsFlushed.java b/core/src/main/java/lucee/runtime/functions/other/IsFlushed.java
new file mode 100644
index 0000000000..de9f5a17fa
--- /dev/null
+++ b/core/src/main/java/lucee/runtime/functions/other/IsFlushed.java
@@ -0,0 +1,33 @@
+/**
+ * Copyright (c) 2015, Lucee Assosication Switzerland
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package lucee.runtime.functions.other;
+
+import lucee.runtime.PageContext;
+import lucee.runtime.ext.function.Function;
+
+/**
+ * implements built in function isFlushed() which returns true if the response stream is committed
+ */
+public final class IsFlushed implements Function  {
+
+    public static boolean call(PageContext pc) {
+
+        return pc.getHttpServletResponse().isCommitted();
+    }
+
+}
diff --git a/core/src/main/java/resource/fld/core-base.fld b/core/src/main/java/resource/fld/core-base.fld
index 3a15225807..8d0c231c31 100755
--- a/core/src/main/java/resource/fld/core-base.fld
+++ b/core/src/main/java/resource/fld/core-base.fld
@@ -7373,6 +7373,15 @@ The following things are considered to be empty:
 		</return>
 	</function>
 	
+	<function>
+		<name>IsFlushed</name>
+		<class>lucee.runtime.functions.other.IsFlushed</class>
+		<description>returns true if the response stream was already flushed.</description>
+		<return>
+			<type>boolean</type>
+		</return>
+	</function>
+
 	<!-- IsIPInRange -->
 	<function>
 		<name>IsIPInRange</name>
diff --git a/loader/build.xml b/loader/build.xml
index 4c61779ef5..253712d1e2 100644
--- a/loader/build.xml
+++ b/loader/build.xml
@@ -2,7 +2,7 @@
 <project default="core" basedir="." name="Lucee" 
   xmlns:resolver="antlib:org.apache.maven.resolver.ant">
 
-  <property name="version" value="6.0.1.79-SNAPSHOT"/>
+  <property name="version" value="6.0.1.80-SNAPSHOT"/>
 
   <taskdef uri="antlib:org.apache.maven.resolver.ant" resource="org/apache/maven/resolver/ant/antlib.xml">
     <classpath>
diff --git a/loader/pom.xml b/loader/pom.xml
index 87ce37fb37..c66ed70d92 100644
--- a/loader/pom.xml
+++ b/loader/pom.xml
@@ -3,7 +3,7 @@
 
   <groupId>org.lucee</groupId>
   <artifactId>lucee</artifactId>
-  <version>6.0.1.79-SNAPSHOT</version>
+  <version>6.0.1.80-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <name>Lucee Loader Build</name>