diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index 9668c161ce3..a57dd0bc581 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -877,7 +877,7 @@ fn print_possibly_embedded_block_(s: ps, blk: ast::blk, embedded: embed_type,
                                   indented: uint, attrs: ~[ast::attribute],
                                   close_box: bool) {
     match blk.node.rules {
-      ast::unsafe_blk => word(s.s, ~"unsafe "),
+      ast::unsafe_blk => word_space(s, ~"unsafe"),
       ast::default_blk => ()
     }
     maybe_print_comment(s, blk.span.lo);