Fix missing param in docs for --js-opts.

1 files changed, 1 insertions, 1 deletions

diff --git a/emcc b/emcc
index d29704dd..88cce433 100755
--- a/emcc
+++ b/emcc
@@ -255,7 +255,7 @@ Options that are modified or new in %s include:
                            1: Parallel typed arrays
                            2: Shared (C-like) typed arrays (default)
 
-  --js-opts                0: Prevent JS optimizer from running
+  --js-opts <on>           0: Prevent JS optimizer from running
                            1: Use JS optimizer (default)
 
   --llvm-opts <level>      0: No LLVM optimizations (default in -O0)