diff --git a/ext/pdo_firebird/config.w32 b/ext/pdo_firebird/config.w32
index 29cd48e4e02..0617b28c3cd 100644
--- a/ext/pdo_firebird/config.w32
+++ b/ext/pdo_firebird/config.w32
@@ -15,5 +15,4 @@ if (PHP_PDO_FIREBIRD != "no") {
 		WARNING("pdo_firebird not enabled; libraries and headers not found");
 	}
 	ADD_EXTENSION_DEP('pdo_firebird', 'pdo');
-	ADD_EXTENSION_DEP('pdo_firebird', 'interbase');
 }