diff --git a/src/dotnet-lib/GS1Encoder.cs b/src/dotnet-lib/GS1Encoder.cs
index 3f3975c..c10c059 100644
--- a/src/dotnet-lib/GS1Encoder.cs
+++ b/src/dotnet-lib/GS1Encoder.cs
@@ -292,15 +292,15 @@ public string Version
         ///   - gs1_encoder_setSym()
         ///
         /// </summary>
-        public int Sym
+        public Symbology Sym
         {
             get
             {
-                return gs1_encoder_getSym(ctx);
+                return (Symbology)gs1_encoder_getSym(ctx);
             }
             set
             {
-                if (!gs1_encoder_setSym(ctx, value))
+                if (!gs1_encoder_setSym(ctx, (int)value))
                     throw new GS1EncoderParameterException(ErrMsg);
             }
         }