diff --git a/core/encoding/json/marshal.odin b/core/encoding/json/marshal.odin
index cdb00a354..e563c326a 100644
--- a/core/encoding/json/marshal.odin
+++ b/core/encoding/json/marshal.odin
@@ -176,7 +176,11 @@ marshal_to_writer :: proc(w: io.Writer, v: any, opt: ^Marshal_Options) -> (err:
 		return .Unsupported_Type
 
 	case runtime.Type_Info_Pointer:
-		return .Unsupported_Type
+		if v.id == typeid_of(Null) {
+			io.write_string(w, "null") or_return
+		} else {
+			return .Unsupported_Type
+		}
 
 	case runtime.Type_Info_Multi_Pointer:
 		return .Unsupported_Type