diff --git a/src/tleextension.c b/src/tleextension.c
index 272a13a..c47ef33 100644
--- a/src/tleextension.c
+++ b/src/tleextension.c
@@ -1177,6 +1177,9 @@ execute_sql_string(const char *sql)
 				QueryDesc  *qdesc;
 
 				qdesc = CreateQueryDesc(stmt,
+#if PG_VERSION_NUM >= 180000
+										NULL,
+#endif
 										sql,
 										GetActiveSnapshot(), NULL,
 										dest, NULL, NULL, 0);