diff --git a/src/databases/firebird.php b/src/databases/firebird.php
index 0c4dfd1..3b806ac 100644
--- a/src/databases/firebird.php
+++ b/src/databases/firebird.php
@@ -12,6 +12,12 @@
 
 // --------------------------------------------------------------------------
 
+// Test for support
+if( ! function_exists('ibase_connect'))
+{
+	return FALSE;
+}
+
 /**
  * Firebird Database class
  * 
diff --git a/src/databases/mysql.php b/src/databases/mysql.php
index a053704..5460a34 100644
--- a/src/databases/mysql.php
+++ b/src/databases/mysql.php
@@ -12,6 +12,12 @@
 
  // --------------------------------------------------------------------------
 
+// Test for support
+if( ! in_array('mysql', pdo_drivers()))
+{
+	return FALSE;
+}
+
  /**
   * MySQL specific class
   *
diff --git a/src/databases/odbc.php b/src/databases/odbc.php
index 8236ef5..b9dfdec 100644
--- a/src/databases/odbc.php
+++ b/src/databases/odbc.php
@@ -12,6 +12,12 @@
 
  // --------------------------------------------------------------------------
 
+// Test for support
+if( ! in_array('odbc', pdo_drivers()))
+{
+	return FALSE;
+}
+
  /**
   * ODBC Database Driver
   *
diff --git a/src/databases/pgsql.php b/src/databases/pgsql.php
index 8557e5b..5a313bd 100644
--- a/src/databases/pgsql.php
+++ b/src/databases/pgsql.php
@@ -12,6 +12,12 @@
 
 // --------------------------------------------------------------------------
 
+// Test for support
+if( ! in_array('pgsql', pdo_drivers()))
+{
+	return FALSE;
+}
+
 /**
  * PostgreSQL specifc class
  *
diff --git a/src/databases/sqlite.php b/src/databases/sqlite.php
index 6e8c742..b59381a 100644
--- a/src/databases/sqlite.php
+++ b/src/databases/sqlite.php
@@ -12,6 +12,12 @@
 
 // --------------------------------------------------------------------------
 
+// Test for support
+if( ! in_array('sqlite', pdo_drivers()))
+{
+	return FALSE;
+}
+
 /**
  * SQLite specific class 
  *
diff --git a/src/windows/add_db.php b/src/windows/add_db.php
index e0f89b9..f9c807c 100644
--- a/src/windows/add_db.php
+++ b/src/windows/add_db.php
@@ -39,12 +39,7 @@ class Add_DB extends GtkWindow {
 	{
 		$table = new GtkTable();
 
-		$db_types = array(
-			'MySQL',
-			'PostgreSQL',
-			'SQLite',
-			'ODBC'
-		);
+		$db_types = $this->get_available_dbs();
 
 		//Table attach 
 		//$tbl->attach(left_start, right_stop, top_start, bottom_stop)
@@ -102,6 +97,33 @@ class Add_DB extends GtkWindow {
 
 		return $table;
 	}
+
+	/**
+	 * Checks what database drivers are available
+	 * 
+	 * @return array
+	 */
+	function get_available_dbs()
+	{
+		$drivers = array();
+
+		// Check if there is pdo support
+		if( ! function_exists('pdo_drivers'))
+		{
+			return FALSE;
+		}
+
+		$drivers = pdo_drivers();
+
+		if(function_exists('ibase_connect'))
+		{
+			$drivers[] = "Firebird";
+		}
+
+		sort($drivers);
+
+		return $drivers;
+	}
 }
 
 // End of add_db.php
\ No newline at end of file