diff --git a/core/constant_inc.php b/core/constant_inc.php
index 7d929cdc5c..c4f2ef8c65 100644
--- a/core/constant_inc.php
+++ b/core/constant_inc.php
@@ -35,6 +35,7 @@
 define( 'WARN', 2 );
 
 # PHP-related constants
+define( 'PHP_MIN_VERSION', '5.5.0' );
 define( 'PHP_CLI', 0 );
 define( 'PHP_CGI', 1 );
 
diff --git a/core/php_api.php b/core/php_api.php
index 44aea3639d..eaa5b724c8 100644
--- a/core/php_api.php
+++ b/core/php_api.php
@@ -27,11 +27,6 @@
  * @link http://www.mantisbt.org
  */
 
-/**
- * Constant for our minimum required PHP version
- */
-define( 'PHP_MIN_VERSION', '5.5.0' );
-
 /**
  * Determine if PHP is running in CLI or CGI mode and return the mode.
  * @return int PHP mode