diff --git a/tools/sindri/sindri b/tools/sindri/sindri
index f21bdba..4131c3c 100755
--- a/tools/sindri/sindri
+++ b/tools/sindri/sindri
@@ -5775,8 +5775,8 @@ var _sindri;
                             ]
                                 // nullability
                                 .concat(data_field.nullable
-                                ? ["NULL"]
-                                : [])
+                                ? []
+                                : ["NOT NULL"])
                                 // default
                                 .concat((data_field.default === undefined)
                                 ? []