Nginx+PHP-FPM - Why was Apache installed automatically?

Today my 14.04 machine that runs Nginx with PHP-FPM received updates for PHP and somehow Apache was automatically installed.

Here is an excerpt from APT history log:
Install: libapache2-mod-php5:amd64 (5.5.9+dfsg-1ubuntu4.1, automatic), libaprutil1-dbd-sqlite3:amd64 (1.5.3-1, automatic), libaprutil1-ldap:amd64 (1.5.3-1, automatic), apache2-data:amd64 (2.4.7-1ubuntu4, automatic), apache2:amd64 (2.4.7-1ubuntu4, automatic), apache2-bin:amd64 (2.4.7-1ubuntu4, automatic)

Looking at the dependencies for the php5 package I don't understand why this happened:
Depends: libapache2-mod-php5 (>= 5.5.9+dfsg-1ubuntu4.1) | libapache2-mod-php5filter (>= 5.5.9+dfsg-1ubuntu4.1) | php5-cgi (>= 5.5.9+dfsg-1ubuntu4.1) | php5-fpm (>= 5.5.9+dfsg-1ubuntu4.1), php5-common (>= 5.5.9+dfsg-1ubuntu4.1)

With Nginx configured to listen on port 80, this unwanted Apache installation would interfere at startup (this exactly happened sometime ago on an older release), and I don't think that this correct, right?