diff --git a/code/PostgreSQLDatabase.php b/code/PostgreSQLDatabase.php
index 3e0de0a..7cfb76d 100644
--- a/code/PostgreSQLDatabase.php
+++ b/code/PostgreSQLDatabase.php
@@ -485,7 +485,7 @@ class PostgreSQLDatabase extends SS_Database {
 		// Assume all indexes also contain the table name
 		// MD5 the table/index name combo to keep it to a fixed length.
 		// Exclude the prefix so that the trigger name can be easily generated from the index name
-		$indexNamePG = "{$prefix}_" . md5("$tableName}_{$indexName}");
+		$indexNamePG = "{$prefix}_" . md5("{$tableName}_{$indexName}");
 
 		// Limit to 63 characters
 		if (strlen($indexNamePG) > 63)