diff --git a/examples/Argon/200K_18mol_l/config_autopas_lc_ALL.xml b/examples/Argon/200K_18mol_l/config_autopas_lc_ALL.xml
index 0314d8902d..11a69520e0 100644
--- a/examples/Argon/200K_18mol_l/config_autopas_lc_ALL.xml
+++ b/examples/Argon/200K_18mol_l/config_autopas_lc_ALL.xml
@@ -56,7 +56,7 @@
                 <writefrequency>5</writefrequency>
                 <outputprefix>decomp</outputprefix>
                 <incremental>1</incremental>
-                <appendTimestamp>0</appendTimestamp>
+                <appendTimestamp>false</appendTimestamp>
             </outputplugin>
             <!--<outputplugin name="MmpldWriter" type="simple">
               <include query="/spheres">../sphereparams_argon.xml</include>
diff --git a/examples/Argon/200K_18mol_l/config_noAP_ALL.xml b/examples/Argon/200K_18mol_l/config_noAP_ALL.xml
index 2fefb5261b..29d11fbb6f 100644
--- a/examples/Argon/200K_18mol_l/config_noAP_ALL.xml
+++ b/examples/Argon/200K_18mol_l/config_noAP_ALL.xml
@@ -52,7 +52,7 @@
 				<writefrequency>5</writefrequency>
 				<outputprefix>decomp</outputprefix>
 				<incremental>1</incremental>
-				<appendTimestamp>0</appendTimestamp>
+				<appendTimestamp>false</appendTimestamp>
 			</outputplugin>
 		</output>
 	</simulation>
diff --git a/examples/Generators/mkesfera/config.xml b/examples/Generators/mkesfera/config.xml
index 4e6d4d64d2..41fa4812e4 100644
--- a/examples/Generators/mkesfera/config.xml
+++ b/examples/Generators/mkesfera/config.xml
@@ -107,7 +107,7 @@
 			<outputplugin name="MPICheckpointWriter">
 				<writefrequency>10</writefrequency>
 				<outputprefix>mkesfera</outputprefix>
-				<appendTimestamp>1</appendTimestamp>
+				<appendTimestamp>true</appendTimestamp>
 				<datarep>native</datarep>
 				<measureTime>1</measureTime>
 				<mpi_info>
diff --git a/examples/all-options.xml b/examples/all-options.xml
index 50e46eb6c8..a759466adb 100644
--- a/examples/all-options.xml
+++ b/examples/all-options.xml
@@ -397,7 +397,7 @@
       <outputplugin name="MPICheckpointWriter">
         <writefrequency>10</writefrequency>
         <outputprefix>default</outputprefix>
-        <appendTimestamp>1</appendTimestamp>
+        <appendTimestamp>true</appendTimestamp>
         <datarep>native</datarep>
         <measureTime>1</measureTime>
       </outputplugin>
diff --git a/src/io/CheckpointWriter.h b/src/io/CheckpointWriter.h
index 61948fdd43..d7e4ddb38a 100644
--- a/src/io/CheckpointWriter.h
+++ b/src/io/CheckpointWriter.h
@@ -22,7 +22,7 @@ class CheckpointWriter : public PluginBase {
 	     <writefrequency>INTEGER</writefrequency>
 	     <outputprefix>STRING</outputprefix>
 	     <incremental>INTEGER</incremental>
-	     <appendTimestamp>INTEGER</appendTimestamp>
+	     <appendTimestamp>BOOL</appendTimestamp>
 	   </outputplugin>
 	   \endcode
 	 */
diff --git a/src/io/CommunicationPartnerWriter.h b/src/io/CommunicationPartnerWriter.h
index c3764481ba..de2016f6e5 100644
--- a/src/io/CommunicationPartnerWriter.h
+++ b/src/io/CommunicationPartnerWriter.h
@@ -23,7 +23,7 @@ class CommunicationPartnerWriter : public PluginBase {
 	     <writefrequency>INTEGER</writefrequency>
 	     <outputprefix>STRING</outputprefix>
 	     <incremental>INTEGER</incremental>
-	     <appendTimestamp>INTEGER</appendTimestamp>
+	     <appendTimestamp>BOOL</appendTimestamp>
 	   </outputplugin>
 	   \endcode
 	 */
diff --git a/src/io/DecompWriter.h b/src/io/DecompWriter.h
index 5c80b65242..2b09f4d8d3 100644
--- a/src/io/DecompWriter.h
+++ b/src/io/DecompWriter.h
@@ -25,7 +25,7 @@ class DecompWriter : public PluginBase {
 	     <writefrequency>INTEGER</writefrequency>
 	     <outputprefix>STRING</outputprefix>
 	     <incremental>INTEGER</incremental>
-	     <appendTimestamp>INTEGER</appendTimestamp>
+	     <appendTimestamp>BOOL</appendTimestamp>
 	   </outputplugin>
 	   \endcode
 	 */
diff --git a/src/io/HaloParticleWriter.h b/src/io/HaloParticleWriter.h
index 2130d43f0c..8b55f30d2b 100644
--- a/src/io/HaloParticleWriter.h
+++ b/src/io/HaloParticleWriter.h
@@ -25,7 +25,7 @@ class HaloParticleWriter : public PluginBase {
 	     <writefrequency>INTEGER</writefrequency>
 	     <outputprefix>STRING</outputprefix>
 	     <incremental>INTEGER</incremental>
-	     <appendTimestamp>INTEGER</appendTimestamp>
+	     <appendTimestamp>BOOL</appendTimestamp>
 	   </outputplugin>
 	   \endcode
 	 */
diff --git a/src/io/KDTreePrinter.h b/src/io/KDTreePrinter.h
index bf341a36b9..20d92c10dd 100644
--- a/src/io/KDTreePrinter.h
+++ b/src/io/KDTreePrinter.h
@@ -13,7 +13,7 @@ class KDTreePrinter : public PluginBase {
 	     <writefrequency>INTEGER</writefrequency>
 	     <outputprefix>STRING</outputprefix>
 	     <incremental>INTEGER</incremental>
-	     <appendTimestamp>INTEGER</appendTimestamp>
+	     <appendTimestamp>BOOL</appendTimestamp>
 	   </outputplugin>
 	   \endcode
 	 */
diff --git a/src/io/XyzWriter.h b/src/io/XyzWriter.h
index 76e80e0c92..b0a5acd6a6 100644
--- a/src/io/XyzWriter.h
+++ b/src/io/XyzWriter.h
@@ -24,7 +24,7 @@ class XyzWriter : public PluginBase {
 	     <writefrequency>INTEGER</writefrequency>
 	     <outputprefix>STRING</outputprefix>
 	     <incremental>INTEGER</incremental>
-	     <appendTimestamp>INTEGER</appendTimestamp>
+	     <appendTimestamp>BOOL</appendTimestamp>
 	   </outputplugin>
 	   \endcode
 	 */