diff --git a/README.md b/README.md
index 1bb08f3..448239d 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,10 @@ sudo ninja -C build install
 See the helptext (`wlsunset -h`)
 
 ## Example
+
 ```
-wlsunset -l 39.913818 -L 116.363625
+# Beijing lat/long.
+wlsunset -l 39.9 -L 116.3
 ```
+
+Greater precision than one decimal place serves no purpose other than padding the command-line (https://xkcd.com/2170/).
diff --git a/main.c b/main.c
index 34adbe2..ef01c7a 100644
--- a/main.c
+++ b/main.c
@@ -348,8 +348,8 @@ static const char usage[] = "usage: %s [options]\n"
 "  -h            show this help message\n"
 "  -T <temp>     set high temperature (default: 6500)\n"
 "  -t <temp>     set low temperature (default: 4000)\n"
-"  -l <lat>      set latitude (e.g. 39.913)\n"
-"  -L <long>     set longitude (e.g. 116.363)\n"
+"  -l <lat>      set latitude (e.g. 39.9)\n"
+"  -L <long>     set longitude (e.g. 116.3)\n"
 "  -d <minutes>  set ramping duration in minutes (default: 60)\n"
 "  -g <gamma>    set gamma (default: 1.0)\n";