diff --git a/rudder-server/SOURCES/rudder-server-postinst b/rudder-server/SOURCES/rudder-server-postinst
index 99a252cc3..1331c4238 100755
--- a/rudder-server/SOURCES/rudder-server-postinst
+++ b/rudder-server/SOURCES/rudder-server-postinst
@@ -37,13 +37,24 @@ echo "`date` - Starting rudder-server post installation script" >> ${LOG_FILE}
 
 # check if a db is configured
 CREATE_DB="true"
-if [ -f /opt/rudder/etc/rudder-web.properties ] && grep -q rudder.jdbc.url /opt/rudder/etc/rudder-web.properties
+if [ -f /opt/rudder/etc/rudder-web.properties ]
 then
-  # if it is an external DB, do not run
-  if ! grep -qE 'rudder.jdbc.url=jdbc:postgresql://(localhost|127\.0\.)' /opt/rudder/etc/rudder-web.properties
+  if grep -q rudder.jdbc.url /opt/rudder/etc/rudder-web.properties
   then
-    echo "INFO: External database detected, skipping rudder-reports postinst"
-    CREATE_DB="false"
+    # if it is an external DB, do not run
+    if ! grep -qE 'rudder.jdbc.url=jdbc:postgresql://(localhost|127\.0\.)' /opt/rudder/etc/rudder-web.properties
+    then
+      echo "INFO: External database detected, skipping database creation"
+      CREATE_DB="false"
+    else
+      USER=$(grep rudder.jdbc.username /opt/rudder/etc/rudder-web.properties)
+      CHK_PG_USER=$(su postgres -c "psql -t -c \"select count(1) from pg_user where usename = '${USERNAME}'\"")
+      if [ ${CHK_PG_DB} -ne 0 ]
+      then
+        echo "INFO: Existing database detected, skipping database creation"
+        CREATE_DB="false"
+      fi
+    fi
   fi
 fi