diff --git a/install.php b/install.php
index 69692af..eb924b5 100644
--- a/install.php
+++ b/install.php
@@ -362,9 +362,15 @@ class InstallRequirements {
 		// Check for token_get_all
 		$this->requireFunction('token_get_all', array("PHP Configuration", "PHP Tokenizer", "PHP tokenizer support not included in PHP."));
 		
+		// Check for session support
+		$this->requireFunction('session_start', array('PHP Configuration', 'Session support', 'Session support not included in PHP.'));
+		
 		// Check for iconv support
 		$this->requireFunction('iconv', array('PHP Configuration', 'iconv support', 'iconv support not included in PHP.'));
 		
+		// Check for hash support
+		$this->requireFunction('hash', array('PHP Configuration', 'hash support', 'hash support not included in PHP.'));
+		
 		// Check memory allocation
 		$this->requireMemory(32*1024*1024, 64*1024*1024, array("PHP Configuration", "Memory allocated (PHP config option 'memory_limit')", "SilverStripe needs a minimum of 32M allocated to PHP, but recommends 64M.", ini_get("memory_limit")));