diff --git a/src/Oci8/Query/Grammars/OracleGrammar.php b/src/Oci8/Query/Grammars/OracleGrammar.php
index 36ff2995..291b68b3 100644
--- a/src/Oci8/Query/Grammars/OracleGrammar.php
+++ b/src/Oci8/Query/Grammars/OracleGrammar.php
@@ -546,7 +546,8 @@ private function resolveClause($column, $values, $type)
         $i           = 0;
         $type        = $this->wrap($column) . ' '.$type.' ';
         foreach ($chunks as $ch) {
-            if ($i > 0) {
+            // Add or only at the second loop
+            if ($i === 1) {
                 $type = ' or ' . $type . ' ';
             }
             $whereClause .= $type . '('.implode(', ', $ch).')';