diff --git a/src/Partcl/commands/expr.pm b/src/Partcl/commands/expr.pm
index 5c9a775..0756338 100644
--- a/src/Partcl/commands/expr.pm
+++ b/src/Partcl/commands/expr.pm
@@ -1,25 +1,25 @@
-#sub expr(*@args) {
-#    my $code := pir::join(' ', @args);
-#    error("empty expression\nin expression \"\"")
-#        if $code eq '';
-#
-#    our %EXPRCACHE;
-#    my &sub := %EXPRCACHE{$code};
-#    unless pir::defined(&sub) {
-#        my $parse :=
-#            Partcl::Grammar.parse(
-#                $code,
-#                :rule('TOP_expr'),
-#                :actions(Partcl::Actions)
-#            );
-#        if $parse {
-#            &sub := PAST::Compiler.compile($parse.ast);
-#            %EXPRCACHE{$code} := ⊂
-#        } else {
-#            error("Invalid expression");
-#        }
-#    }
-#    &sub();
-#}
-#
-## vim: expandtab shiftwidth=4 ft=perl6:
+sub expr(*@args) {
+    my $code := nqp::join(' ', @args);
+    error("empty expression\nin expression \"\"")
+        if $code eq '';
+
+    our %EXPRCACHE;
+    my &sub := %EXPRCACHE{$code};
+    unless nqp::defined(&sub) {
+        my $parse :=
+            Partcl::Grammar.parse(
+                $code,
+                :rule('TOP_expr'),
+                :actions(Partcl::Actions)
+            );
+        if $parse {
+            &sub := PAST::Compiler.compile($parse.ast);
+            %EXPRCACHE{$code} := ⊂
+        } else {
+            error("Invalid expression");
+        }
+    }
+    &sub();
+}
+
+# vim: expandtab shiftwidth=4 ft=perl6: