diff --git a/hsarback/src/de/hsadmin/mods/dom/DomainProcessorFactory.java b/hsarback/src/de/hsadmin/mods/dom/DomainProcessorFactory.java
index 2c6fd98..feab37b 100644
--- a/hsarback/src/de/hsadmin/mods/dom/DomainProcessorFactory.java
+++ b/hsarback/src/de/hsadmin/mods/dom/DomainProcessorFactory.java
@@ -272,8 +272,8 @@ public class DomainProcessorFactory implements EntityProcessorFactory {
 			new ShellProcessor("export PEMS_DIR=/etc/apache2/pems-enabled/" + dom.getUser().getName() + " && "
 					+ "mkdir -p $PEMS_DIR/ && "
 					+ "cd $PEMS_DIR && "
-					+ "echo \"\" > " + domName + ".chain && "
-					+ "openssl req -x509 -newkey rsa:2048 -keyout " + domName + ".key -out " + domName + ".crt -days 1100 -nodes -sha256 -subj '/CN=" + domName + "' &&"
+					+ "( ls " + domName + ".crt || ( echo \"\" > " + domName + ".chain && "
+					+ "openssl req -x509 -newkey rsa:2048 -keyout " + domName + ".key -out " + domName + ".crt -days 1100 -nodes -sha256 -subj '/CN=" + domName + "' ) ) &&"
 					+ "chmod 400 " + domName + "*"),
 			new CreateFileProcessor("/de/hsadmin/mods/dom/apache-vhost.vm", templateVars, dom, "/etc/apache2/sites-available/" + domName + ".tmp", "root", "root", "644", true),
 			new ShellProcessor(