diff --git a/plugins/system/cpu-usage-by-process b/plugins/system/cpu-usage-by-process
index 0b74a3e8..b00b9860 100755
--- a/plugins/system/cpu-usage-by-process
+++ b/plugins/system/cpu-usage-by-process
@@ -65,7 +65,7 @@ fi
 
 for proc in $procs ; do {
 
-    ps -axo 'pcpu,comm' | grep "$proc" |
+    ps axo 'pcpu,comm' | grep "$proc" |
     awk '
     BEGIN {
         FS=" "