diff --git a/ext/pdo/config.m4 b/ext/pdo/config.m4
index 2145f053979db..dccf898785831 100644
--- a/ext/pdo/config.m4
+++ b/ext/pdo/config.m4
@@ -16,7 +16,6 @@ if test "$PHP_PDO" != "no"; then
     pdo_sql_parser.h
     php_pdo_driver.h
     php_pdo_error.h
-    php_pdo_int.h
     php_pdo.h
   ]))
   PHP_ADD_MAKEFILE_FRAGMENT
diff --git a/ext/pdo/config.w32 b/ext/pdo/config.w32
index d92ccb926ab5a..d1768ed86cda7 100644
--- a/ext/pdo/config.w32
+++ b/ext/pdo/config.w32
@@ -10,7 +10,6 @@ if (PHP_PDO != "no") {
 		"pdo_sql_parser.h " +
 		"php_pdo_driver.h " +
 		"php_pdo_error.h " +
-		"php_pdo_int.h " +
 		"php_pdo.h"
 	);
 }
diff --git a/ext/pdo/pdo_sql_parser.re b/ext/pdo/pdo_sql_parser.re
index 1de8a61854911..a87fd473404ec 100644
--- a/ext/pdo/pdo_sql_parser.re
+++ b/ext/pdo/pdo_sql_parser.re
@@ -16,7 +16,6 @@
 
 #include "php.h"
 #include "php_pdo_driver.h"
-#include "php_pdo_int.h"
 #include "pdo_sql_parser.h"
 
 static int default_scanner(pdo_scanner_t *s)
diff --git a/ext/pdo_mysql/mysql_sql_parser.re b/ext/pdo_mysql/mysql_sql_parser.re
index 7dc7feeb70453..01afbefaaa8d3 100644
--- a/ext/pdo_mysql/mysql_sql_parser.re
+++ b/ext/pdo_mysql/mysql_sql_parser.re
@@ -17,7 +17,6 @@
 
 #include "php.h"
 #include "ext/pdo/php_pdo_driver.h"
-#include "ext/pdo/php_pdo_int.h"
 #include "ext/pdo/pdo_sql_parser.h"
 
 int pdo_mysql_scanner(pdo_scanner_t *s)
diff --git a/ext/pdo_pgsql/pgsql_sql_parser.re b/ext/pdo_pgsql/pgsql_sql_parser.re
index ff7f2f731f0b5..caea615c40735 100644
--- a/ext/pdo_pgsql/pgsql_sql_parser.re
+++ b/ext/pdo_pgsql/pgsql_sql_parser.re
@@ -17,7 +17,6 @@
 
 #include "php.h"
 #include "ext/pdo/php_pdo_driver.h"
-#include "ext/pdo/php_pdo_int.h"
 #include "ext/pdo/pdo_sql_parser.h"
 
 int pdo_pgsql_scanner(pdo_scanner_t *s)
diff --git a/ext/pdo_sqlite/sqlite_sql_parser.re b/ext/pdo_sqlite/sqlite_sql_parser.re
index d1b6f099d7319..5678e60255775 100644
--- a/ext/pdo_sqlite/sqlite_sql_parser.re
+++ b/ext/pdo_sqlite/sqlite_sql_parser.re
@@ -17,7 +17,6 @@
 
 #include "php.h"
 #include "ext/pdo/php_pdo_driver.h"
-#include "ext/pdo/php_pdo_int.h"
 #include "ext/pdo/pdo_sql_parser.h"
 
 int pdo_sqlite_scanner(pdo_scanner_t *s)