diff --git a/ext/informix/ifx.ec b/ext/informix/ifx.ec
index d7e6037a29e..80055aca796 100644
--- a/ext/informix/ifx.ec
+++ b/ext/informix/ifx.ec
@@ -42,7 +42,7 @@
 
 #include "php.h"
 #include "php_globals.h"
-#include "ext/standard/php3_standard.h"
+#include "ext/standard/php_standard.h"
 #include "php_informix.h"
 #include "php_globals.h"
 #include "php_ini.h"