diff --git a/makeHornInF.sh b/makeHornInF.sh
index 5d1e857..44cc7c4 100755
--- a/makeHornInF.sh
+++ b/makeHornInF.sh
@@ -10,7 +10,7 @@ fi
 # Transpose down (return 0) if top note was > e (> a for horn).
 transposedown()
 {
-    return $(($2 <= 109))
+    return (($2 <= 109))
 }
 
 dir=`pwd`