diff --git a/ln.json/JSONNumber.cs b/ln.json/JSONNumber.cs
index 2a0e9b1..d0024e5 100644
--- a/ln.json/JSONNumber.cs
+++ b/ln.json/JSONNumber.cs
@@ -20,6 +20,10 @@ namespace ln.json
             return (double)decValue;
         }
 
+        public JSONNumber(short i)
+            : this((long)i) { }
+        public JSONNumber(ushort i)
+            : this((long)i) { }
         public JSONNumber(int i)
             : this((long)i) { }