diff --git a/Info/Layer2.pm b/Info/Layer2.pm
index 6ed25801..de84c7d3 100644
--- a/Info/Layer2.pm
+++ b/Info/Layer2.pm
@@ -134,8 +134,8 @@ sub serial {
 
     # precedence
     #   serial2,chassis parse,serial1
-    return $1 if (defined $chassis and $chassis =~ /serial#?:\s*([a-z0-9]+)/i);
     return $serial2 if (defined $serial2 and $serial2 !~ /^\s*$/);
+    return $1 if (defined $chassis and $chassis =~ /serial#?:\s*([a-z0-9]+)/i);
     return $serial1 if (defined $serial1 and $serial1 !~ /^\s*$/);
 
     return undef;
diff --git a/Info/Layer3.pm b/Info/Layer3.pm
index 30e0516c..d6135eef 100644
--- a/Info/Layer3.pm
+++ b/Info/Layer3.pm
@@ -151,8 +151,8 @@ sub serial {
     
     # precedence
     #   serial2,chassis parse,serial1
-    return $1 if (defined $chassis and $chassis =~ /serial#?:\s*([a-z0-9]+)/i);
     return $serial2 if (defined $serial2 and $serial2 !~ /^\s*$/);
+    return $1 if (defined $chassis and $chassis =~ /serial#?:\s*([a-z0-9]+)/i);
     return $serial1 if (defined $serial1 and $serial1 !~ /^\s*$/);
 
     return undef;