diff --git a/route.go b/route.go
index a43dab5..02aefd7 100644
--- a/route.go
+++ b/route.go
@@ -275,6 +275,12 @@ func (c *RouteConverter) readDescription() (string, string) {
 	}
 
 	file, _ := handlerValue.FileLine(pc)
+	if file == "<autogenerated>" {
+		// Fix for Go 1.18 change
+		// https://github.com/golang/go/issues/51774
+
+		return funcName, ""
+	}
 	astFile := c.getAST(file)
 
 	var doc *ast.CommentGroup