diff --git a/ext/intl/idn/idn.cpp b/ext/intl/idn/idn.cpp
index 94990baff4832..2c727b6f67c25 100644
--- a/ext/intl/idn/idn.cpp
+++ b/ext/intl/idn/idn.cpp
@@ -20,8 +20,9 @@
 #include <config.h>
 #endif
 
-#include <php.h>
-
+extern "C" {
+#include "../php_intl.h"
+}
 #include <unicode/uidna.h>
 #include <unicode/ustring.h>