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-rw-r--r--mu.arc4
1 files changed, 2 insertions, 2 deletions
diff --git a/mu.arc b/mu.arc
index b4223c5b..d7ca1afe 100644
--- a/mu.arc
+++ b/mu.arc
@@ -471,8 +471,8 @@
                       (continue)))
                 jump-unless  ; convenient helper
                   (let flag (m arg.0)
-                    (trace "jump" "checking that " flag " is not t")
-                    (unless (is t flag)
+                    (trace "jump" "checking " flag)
+                    (when (no flag)
                       (= pc.routine* (+ 1 pc.routine* (v arg.1)))
                       (trace "jump" "jumping to " pc.routine*)
                       (continue)))