diff --git a/src/compiler/WebSharper.Core/Macros.fs b/src/compiler/WebSharper.Core/Macros.fs
index cb5308dd7..52ba4400c 100644
--- a/src/compiler/WebSharper.Core/Macros.fs
+++ b/src/compiler/WebSharper.Core/Macros.fs
@@ -403,6 +403,11 @@ type NumericMacro() =
             translateCompareTo c.Compilation (ConcreteType c.DefiningType) c.This.Value c.Arguments.Head
         | _ -> MacroFallback
 
+    override this.TranslateCtor(c) =
+        match c.Arguments with
+        | [] -> MacroOk (Value (Int 0))
+        | _ -> MacroError "numericMacro error: contructor with arguments"
+
 let charTy, charParse =
     let t = typeof<System.Char>
     Reflection.ReadTypeDefinition t,
diff --git a/src/sitelets/WebSharper.Sitelets/RouterInfer.Client.fs b/src/sitelets/WebSharper.Sitelets/RouterInfer.Client.fs
index d210c8189..3b18e8869 100644
--- a/src/sitelets/WebSharper.Sitelets/RouterInfer.Client.fs
+++ b/src/sitelets/WebSharper.Sitelets/RouterInfer.Client.fs
@@ -86,6 +86,14 @@ module private ClientRoutingInternals =
     let rIntOp = getMethod <@ RouterOperators.rInt @>
     let rDoubleOp = getMethod <@ RouterOperators.rDouble @>
     let rDateTimeOp = getMethod <@ RouterOperators.rDateTime @>
+    let rSByteOp = getMethod <@ RouterOperators.rSByte @>
+    let rByteOp = getMethod <@ RouterOperators.rByte @>
+    let rInt16Op = getMethod <@ RouterOperators.rInt16 @>
+    let rUInt16Op = getMethod <@ RouterOperators.rUInt16 @>
+    let rUInt32Op = getMethod <@ RouterOperators.rUInt @>
+    let rInt64Op = getMethod <@ RouterOperators.rInt64 @>
+    let rUInt64Op = getMethod <@ RouterOperators.rUInt64 @>
+    let rSingleOp = getMethod <@ RouterOperators.rSingle @>
     let TupleOp = getMethod <@ RouterOperators.JSTuple [||] @>
     let ArrayOp = getMethod <@ RouterOperators.JSArray RouterOperators.rInt @>
     let ListOp = getMethod <@ RouterOperators.JSList RouterOperators.rInt @>
@@ -228,6 +236,22 @@ type RoutingMacro() =
                     true, Call(None, NonGeneric routerOpsModule, NonGeneric rDoubleOp, []) 
                 | C (T "System.DateTime", []) ->
                     true, Call(None, NonGeneric routerOpsModule, NonGeneric rDateTimeOp, []) 
+                | C (T "System.SByte", []) ->
+                    true, Call(None, NonGeneric routerOpsModule, NonGeneric rSByteOp, []) 
+                | C (T "System.Byte", []) ->
+                    true, Call(None, NonGeneric routerOpsModule, NonGeneric rByteOp, []) 
+                | C (T "System.Int16", []) ->
+                    true, Call(None, NonGeneric routerOpsModule, NonGeneric rInt16Op, []) 
+                | C (T "System.UInt16", []) ->
+                    true, Call(None, NonGeneric routerOpsModule, NonGeneric rUInt16Op, []) 
+                | C (T "System.UInt32", []) ->
+                    true, Call(None, NonGeneric routerOpsModule, NonGeneric rUInt32Op, []) 
+                | C (T "System.Int64", []) ->
+                    true, Call(None, NonGeneric routerOpsModule, NonGeneric rInt64Op, []) 
+                | C (T "System.UInt64", []) ->
+                    true, Call(None, NonGeneric routerOpsModule, NonGeneric rUInt64Op, []) 
+                | C (T "System.Single", []) ->
+                    true, Call(None, NonGeneric routerOpsModule, NonGeneric rSingleOp, []) 
                 | TupleType (ts, _) ->
                     let fields = NewArray (ts |> List.map getRouter)
                     true, Call(None, NonGeneric routerOpsModule, NonGeneric TupleOp, [ fields ])    
diff --git a/src/sitelets/WebSharper.Sitelets/RouterInfer.Server.fs b/src/sitelets/WebSharper.Sitelets/RouterInfer.Server.fs
index 18944febe..3db9f4cd0 100644
--- a/src/sitelets/WebSharper.Sitelets/RouterInfer.Server.fs
+++ b/src/sitelets/WebSharper.Sitelets/RouterInfer.Server.fs
@@ -259,22 +259,22 @@ module internal ServerRouting =
             match t.Namespace with
             | "System" ->
                 match t.Name with
-                | "Object" ->
-                    IEmpty
-                | "String" ->
-                    iString 
-                | "Char" ->
-                    iChar 
-                | "Guid" ->
-                    iGuid 
-                | "Boolean" ->
-                    iBool 
-                | "Int32" ->
-                    iInt
-                | "Double" ->
-                    iDouble 
-                | "DateTime" ->
-                    iDateTime None
+                | "Object" -> IEmpty
+                | "String" -> iString 
+                | "Char" -> iChar 
+                | "Guid" -> iGuid 
+                | "Boolean" -> iBool 
+                | "Int32" -> iInt
+                | "Double" -> iDouble 
+                | "DateTime" -> iDateTime None
+                | "SByte" -> iSByte 
+                | "Byte" -> iByte 
+                | "Int16" -> iInt16 
+                | "UInt16" -> iUInt16
+                | "UInt32" -> iUInt 
+                | "Int64" -> iInt64 
+                | "UInt64" -> iUInt64
+                | "Single" -> iSingle
                 | "Nullable`1" ->
                     let item = t.GetGenericArguments().[0]
                     INullable (getRouter item)
diff --git a/tests/WebSharper.Web.Tests/Routers.fs b/tests/WebSharper.Web.Tests/Routers.fs
index 8297137d3..f55dc72ff 100644
--- a/tests/WebSharper.Web.Tests/Routers.fs
+++ b/tests/WebSharper.Web.Tests/Routers.fs
@@ -20,6 +20,7 @@
 
 namespace WebSharper.Sitelets.Tests
 
+open System
 open WebSharper
 open WebSharper.Sitelets
 open WebSharper.CSharp.Sitelets.Tests
@@ -86,6 +87,8 @@ module PerformanceTests =
         | [<EndPoint "/wildcard-list"; Wildcard>] UWildcardList of int list
         | [<EndPoint "/two-unions">] UTwoUnions of MultipleTest * MultipleTest
         | [<EndPoint "/csharp">] UCSharp of CSharpEndPointRoot
+        | [<EndPoint "/type-tests">] TypeTests of 
+            Guid * single * double * sbyte * byte * int16 * uint16 * uint32 * int64 * uint64  
 
     let TestValues =
         [
@@ -129,6 +132,7 @@ module PerformanceTests =
             UTwoUnions (A1 1, A1 1)
             UCSharp (new CSharpEndPointRoot())
             UCSharp (new CSharpEndPointRoot.Sub1(X = 42))
+            TypeTests (Guid.NewGuid(), 1.3f, 1.4, 15y, 16uy, 64s, 65us, 66u, 67L, 68UL) 
         ]
 
     let ExtraTestValues =