diff --git a/ext/pdo_pgsql/pgsql_driver.c b/ext/pdo_pgsql/pgsql_driver.c
index 54bf7ede6bfaa..7575f788aa476 100644
--- a/ext/pdo_pgsql/pgsql_driver.c
+++ b/ext/pdo_pgsql/pgsql_driver.c
@@ -29,7 +29,6 @@
 #include "pdo/php_pdo_driver.h"
 #include "pdo/php_pdo_error.h"
 #include "ext/standard/file.h"
-#undef SIZEOF_OFF_T
 #include "php_pdo_pgsql.h"
 #include "php_pdo_pgsql_int.h"
 #include "zend_exceptions.h"