diff --git a/clocks/cricket/cricket.system.s b/clocks/cricket/cricket.system.s
index 0529777..ac0c499 100644
--- a/clocks/cricket/cricket.system.s
+++ b/clocks/cricket/cricket.system.s
@@ -75,6 +75,7 @@ ssc_not_found:
 
         ;; Init SSC and try the "Read Cricket ID code" sequence.
 init_ssc:
+        sei
         lda     COMMAND         ; save status of SSC registers
         sta     saved_command
         lda     CONTROL