1 files changed, 2 insertions, 1 deletions

diff --git a/lib/command.ml b/lib/command.ml
index 74b616a..a55fb9e 100644
--- a/lib/command.ml
+++ b/lib/command.ml
@@ -93,7 +93,8 @@ let n_stream =
     match (s, k) with
     | `start, Key '"' -> (`chord_reg_pre, Partial k)
     (* Register *)
-    | `chord_reg_pre, Key c -> (`chord_reg c, Partial k)
+    | `chord_reg_pre, Key c when Char.('!' <= c && c <= '~') ->
+        (`chord_reg c, Partial k)
     (* Count (first) *)
     | `start, Key n when Char.('1' <= n && n <= '9') ->
         let n = Char.to_int n - 48 in