diff --git a/emailaddr.c b/emailaddr.c
index 6bbd9d2..39eff3b 100644
--- a/emailaddr.c
+++ b/emailaddr.c
@@ -2,6 +2,11 @@
 #include <fmgr.h>
 #include <utils/builtins.h>
 
+#ifdef PG_VERSION_NUM
+    #if PG_VERSION_NUM >= 160000
+        #include "varatt.h"
+    #endif
+#endif
 
 PG_MODULE_MAGIC;