diff --git a/scripts/beep-charlie b/scripts/beep-charlie
index 5490c84..29030a3 100755
--- a/scripts/beep-charlie
+++ b/scripts/beep-charlie
@@ -5,7 +5,7 @@ test -f $lock && exit 1 || touch $lock
 head -c 8 /dev/urandom | \
    hexdump -v -e '/1 "%u\n"' | \
    awk '{ split("0,3,5,6,7,10,12",a,","); \
-   for (i = 0; i < 1; i+= 0.00011) \
+   for (i = 0; i < 1; i+= 0.00012) \
    printf("%08X\n", 60*sin(450*exp((a[$1 % 8]/12)*log(2))*i)) }' | \
    xxd -r -p | \
    aplay -c 1 -f S32_LE -r 48000 -D plug:default