diff --git a/src/expressions/call-expr.md b/src/expressions/call-expr.md
index d913ce712..399408d86 100644
--- a/src/expressions/call-expr.md
+++ b/src/expressions/call-expr.md
@@ -68,7 +68,7 @@ struct Bar;
 impl Pretty for Bar {
     fn print(&self) {}
 }
-impl Ugly for Bar{
+impl Ugly for Bar {
     fn print(&self) {}
 }