diff --git a/package.rc b/package.rc
index 1231853..e2b8a4a 100644
--- a/package.rc
+++ b/package.rc
@@ -1,6 +1,6 @@
 #!/bin/rc
 
-flagfmt='o:out'
+flagfmt='o:out out'
 args='wasmfile'
 if(! eval `''{aux/getflags $*} || ~ $#* 0)
 	exec aux/usage