diff --git a/plugins/unicorn/unicorn_ b/plugins/unicorn/unicorn_
index 07682d87..193a23be 100644
--- a/plugins/unicorn/unicorn_
+++ b/plugins/unicorn/unicorn_
@@ -27,7 +27,7 @@ if [ "$mode" = "memory" ]; then
                 exit 0
         else
 
-        memory_array=(`ps auwx | grep "unicorn worker" | grep -v grep | awk '{print $6 }'`)
+        memory_array=(`ps auwx | egrep "unicorn.* worker" | grep -v grep | awk '{print $6 }'`)
 
         for i in "${memory_array[@]}"
             do
@@ -46,7 +46,7 @@ elif [ "$mode" = "processes" ]; then
                 echo "processes.label active processes"
         else
                 echo -n "processes.value "
-                ps awwwux | grep 'unicorn worker' | grep -v grep | wc -l
+                ps awwwux | egrep "unicorn.* worker" | grep -v grep | wc -l
                 exit 0
         fi
 
@@ -61,7 +61,7 @@ elif [ "$mode" = "average" ]; then
         echo 'unicorn_average.info The average process size for Unicorn'
         else
                 echo -n "unicorn_average.value "
-                ps awwwux | grep 'unicorn worker' | grep -v grep | grep -v master | awk '{total_mem = $6 * 1024 + total_mem; total_proc++} END{printf("%d\n", total_mem / total_proc)}'
+                ps awwwux | egrep "unicorn.* worker" | grep -v grep | grep -v master | awk '{total_mem = $6 * 1024 + total_mem; total_proc++} END{printf("%d\n", total_mem / total_proc)}'
                 exit 0
         fi