diff --git t3lib/db/class.t3lib_db_preparedstatement.php t3lib/db/class.t3lib_db_preparedstatement.php
index ec602c9..62848b7 100644
--- t3lib/db/class.t3lib_db_preparedstatement.php
+++ t3lib/db/class.t3lib_db_preparedstatement.php
@@ -213,6 +213,11 @@ class t3lib_db_PreparedStatement {
 					throw new InvalidArgumentException('$value is not a boolean as expected: ' . $value, 1281868687);
 				}
 				break;
+			case self::PARAM_NULL:
+				if (!is_null($value)) {
+					throw new InvalidArgumentException('$value is not NULL as expected: ' . $value, 1281868687);
+				}
+				break;
 		}
 
 		$key = is_int($parameter) ? $parameter - 1 : $parameter;
@@ -251,8 +256,8 @@ class t3lib_db_PreparedStatement {
 
 		if (count($input_parameters) > 0) {
 			$parameterValues = array();
-			foreach ($input_parameters as $value) {
-				$parameterValues[] = array(
+			foreach ($input_parameters as $key => $value) {
+				$parameterValues[$key] = array(
 					'value' => $value,
 					'type'  => $this->guessValueType($value),
 				);
@@ -447,6 +452,10 @@ class t3lib_db_PreparedStatement {
 					$query = implode('', $parts);
 				}
 			} else {
+				if (!preg_match('/^:[\w]+$/', $key)) {
+					throw new InvalidArgumentException('Parameter names must start with ":" followed by at least one alphanumerical character.', 1282348825);
+				}
+
 				for ($i = 1; $i < count($precompiledQueryParts['queryParts']); $i++) {
 					if ($precompiledQueryParts['queryParts'][$i] === $key) {
 						$precompiledQueryParts['queryParts'][$i] = $value;