diff --git a/README.md b/README.md
index 51f627c..db29585 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@ If format strings are added to `status-right`, they should now be visible.
 ### Optional requirements (Linux, BSD, OSX)
 
 - `iostat` or `sar` are the best way to get an accurate CPU percentage.
-A fallback is included using `ps -aux` but could be inaccurate.
+A fallback is included using `ps aux` but could be inaccurate.
 - `free` is used for obtaining system RAM status.
 - `lm-sensors` is used for CPU temperature.
 - `nvidia-smi` is required for GPU information.
diff --git a/scripts/cpu_percentage.sh b/scripts/cpu_percentage.sh
index 15190f0..5e6efe0 100755
--- a/scripts/cpu_percentage.sh
+++ b/scripts/cpu_percentage.sh
@@ -29,7 +29,7 @@ print_cpu_percentage() {
       # shellcheck disable=SC2059
       printf "$cpu_percentage_format" "$usage"
     else
-      load=$(cached_eval ps -aux | awk '{print $3}' | tail -n+2 | awk '{s+=$1} END {print s}')
+      load=$(cached_eval ps aux | awk '{print $3}' | tail -n+2 | awk '{s+=$1} END {print s}')
       cpus=$(cpus_number)
       echo "$load $cpus" | awk -v format="$cpu_percentage_format" '{printf format, $1/$2}'
     fi