diff --git a/src/preserves/private/preserves_schema_nim.nim b/src/preserves/private/preserves_schema_nim.nim
index b086b1d..c38af83 100644
--- a/src/preserves/private/preserves_schema_nim.nim
+++ b/src/preserves/private/preserves_schema_nim.nim
@@ -378,6 +378,11 @@ proc generateProcs(result: var seq[PNode]; name: string; sn: SchemaNode) =
 
 proc collectRefImports(imports: PNode; sn: SchemaNode) =
   case sn.kind
+  of snkLiteral:
+    if sn.value.isDictionary:
+      imports.add ident"std/tables"
+  of snkDictOf:
+    imports.add ident"std/tables"
   of snkRef:
     if sn.refPath.len > 1:
       imports.add ident(sn.refPath[0].toLowerAscii)