diff --git a/lib/FusionInventory/Agent/Tools/Unix.pm b/lib/FusionInventory/Agent/Tools/Unix.pm
index d8eff171d0..1564843c58 100644
--- a/lib/FusionInventory/Agent/Tools/Unix.pm
+++ b/lib/FusionInventory/Agent/Tools/Unix.pm
@@ -288,6 +288,8 @@ sub getProcessesFromPs {
         my $time = $10;
         my $cmd = $11;
 
+        my $emailPattern = join ('|', keys %month);
+
 	# try to get a consistant time format
         my $begin;
         if ($started =~ /^(\d{1,2}):(\d{2})/) {
@@ -297,12 +299,12 @@ sub getProcessesFromPs {
             # Sat03PM
             my $start_day = $2;
             $begin = sprintf("%04d-%02d-%02d %s", $year, $month, $start_day, $time);
-        } elsif ($started =~ /^(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)(\d{2})/) {
+        } elsif ($started =~ /^($emailPattern)(\d{2})/) {
             # Apr03
             my $start_month = $1;
             my $start_day = $2;
             $begin = sprintf("%04d-%02d-%02d %s", $year, $month{$start_month}, $start_day, $time);
-        } elsif ($started =~ /^(\d{1,2})(\w{3})\d{1,2}/) {
+        } elsif ($started =~ /^(\d{1,2})($emailPattern)\d{1,2}/) {
             # 5Oct10
             my $start_day = $1;
             my $start_month = $2;