diff --git a/core/includes/install.inc b/core/includes/install.inc
index efba3c1..bd3e269 100644
--- a/core/includes/install.inc
+++ b/core/includes/install.inc
@@ -920,6 +920,7 @@ function install_profile_info($profile, $langcode = 'en') {
       'version' => NULL,
       'hidden' => FALSE,
       'php' => DRUPAL_MINIMUM_PHP,
+      'php_memory_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT,
     );
     $profile_file = drupal_get_path('profile', $profile) . "/$profile.info";
     $info = drupal_parse_info_file($profile_file);
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index ac983aa..57a969c 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -47,6 +47,15 @@ function system_requirements($phase) {
       );
     }
   }
+  if (isset($GLOBALS['install_state']['profile_info'])) {
+    $profile_info = $GLOBALS['install_state']['profile_info'];
+  }
+  else {
+    if (!isset($profile)) {
+      $profile = drupal_get_profile();
+    }
+    $profile_info = install_profile_info($profile);
+  }
 
   // Web server information.
   $software = $_SERVER['SERVER_SOFTWARE'];
@@ -72,8 +81,8 @@ function system_requirements($phase) {
     );
   }
 
-  if (version_compare($phpversion, DRUPAL_MINIMUM_PHP) < 0) {
-    $requirements['php']['description'] = $t('Your PHP installation is too old. Drupal requires at least PHP %version.', array('%version' => DRUPAL_MINIMUM_PHP));
+  if (version_compare($phpversion, $profile_info['php']) < 0) {
+    $requirements['php']['description'] = $t('Your PHP installation is too old. Drupal requires at least PHP %version.', array('%version' => $profile_info['php']));
     $requirements['php']['severity'] = REQUIREMENT_ERROR;
     // If PHP is old, it's not safe to continue with the requirements check.
     return $requirements;
@@ -202,16 +211,16 @@ function system_requirements($phase) {
     'value' => $memory_limit == -1 ? t('-1 (Unlimited)') : $memory_limit,
   );
 
-  if (!drupal_check_memory_limit(DRUPAL_MINIMUM_PHP_MEMORY_LIMIT, $memory_limit)) {
+  if (!drupal_check_memory_limit($profile_info['php_memory_limit'], $memory_limit)) {
     $description = '';
     if ($phase == 'install') {
-      $description = $t('Consider increasing your PHP memory limit to %memory_minimum_limit to help prevent errors in the installation process.', array('%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT));
+      $description = $t('Consider increasing your PHP memory limit to %memory_minimum_limit to help prevent errors in the installation process.', array('%memory_minimum_limit' => $profile_info['php_memory_limit']));
     }
     elseif ($phase == 'update') {
-      $description = $t('Consider increasing your PHP memory limit to %memory_minimum_limit to help prevent errors in the update process.', array('%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT));
+      $description = $t('Consider increasing your PHP memory limit to %memory_minimum_limit to help prevent errors in the update process.', array('%memory_minimum_limit' => $profile_info['php_memory_limit']));
     }
     elseif ($phase == 'runtime') {
-      $description = $t('Depending on your configuration, Drupal can run with a %memory_limit PHP memory limit. However, a %memory_minimum_limit PHP memory limit or above is recommended, especially if your site uses additional custom or contributed modules.', array('%memory_limit' => $memory_limit, '%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT));
+      $description = $t('Depending on your configuration, Drupal can run with a %memory_limit PHP memory limit. However, a %memory_minimum_limit PHP memory limit or above is recommended, especially if your site uses additional custom or contributed modules.', array('%memory_limit' => $memory_limit, '%memory_minimum_limit' => $profile_info['php_memory_limit']));
     }
 
     if (!empty($description)) {