diff --git a/build.sh b/build.sh
index 38678b879ca99317c464e782d7ef169d6dfaffd2..bab8eb7c4dbc2e7f63fa15676b7883bf26d1880a 100755
--- a/build.sh
+++ b/build.sh
@@ -70,6 +70,9 @@ a2ensite ${APACHE_SITES}
 # The file is named 00modsecurity.conf so it is loaded first.
 mv /etc/modsecurity/modsecurity.conf-recommended /etc/modsecurity/00modsecurity.conf
 
+# This needs to be writable for mod security to be able to start.
+install -d -m 1777 /var/log/apache2
+
 # Ensure that the mount points exist.
 mkdir -p /opt/noblogs/www/wp-content/blogs.dir
 mkdir -p /opt/noblogs/www/wp-content/cache