diff --git a/ftk/format/template/Interp.hx b/ftk/format/template/Interp.hx
index ef77939..dfb1a1e 100644
--- a/ftk/format/template/Interp.hx
+++ b/ftk/format/template/Interp.hx
@@ -75,7 +75,7 @@ class Interp {
 			} );
 		}
 
-		hinterp.variables.set( "__toString__", Std.string );
+		hinterp.variables.set( "__toString__", __toString__ );
 		hinterp.variables.set( "__hscriptSource__", function ( __hscriptSource__ ){
 			if( runtimePos ){	
 				sourcesStack.push( currentSource );
@@ -98,6 +98,10 @@ class Interp {
 		}
 	}
 
+	public dynamic function __toString__( o : Null<Dynamic> ) : String {
+		return Std.string( o );
+	}
+
 	/*  
 	*	Main function that interprets a template
 	*