diff --git a/route/sys_darwin.go b/route/sys_darwin.go
index e742c91..d2daf5c 100644
--- a/route/sys_darwin.go
+++ b/route/sys_darwin.go
@@ -13,7 +13,7 @@
 	}
 }
 
-// A RouteMetrics represents route metrics.
+// RouteMetrics represents route metrics.
 type RouteMetrics struct {
 	PathMTU int // path maximum transmission unit
 }
@@ -30,7 +30,7 @@
 	}
 }
 
-// A InterfaceMetrics represents interface metrics.
+// InterfaceMetrics represents interface metrics.
 type InterfaceMetrics struct {
 	Type int // interface type
 	MTU  int // maximum transmission unit
diff --git a/route/sys_dragonfly.go b/route/sys_dragonfly.go
index b175cb1..0c14bc2 100644
--- a/route/sys_dragonfly.go
+++ b/route/sys_dragonfly.go
@@ -8,7 +8,7 @@
 
 func (typ RIBType) parseable() bool { return true }
 
-// A RouteMetrics represents route metrics.
+// RouteMetrics represents route metrics.
 type RouteMetrics struct {
 	PathMTU int // path maximum transmission unit
 }
@@ -25,7 +25,7 @@
 	}
 }
 
-// A InterfaceMetrics represents interface metrics.
+// InterfaceMetrics represents interface metrics.
 type InterfaceMetrics struct {
 	Type int // interface type
 	MTU  int // maximum transmission unit
diff --git a/route/sys_freebsd.go b/route/sys_freebsd.go
index 010d4ae..89ba1c4 100644
--- a/route/sys_freebsd.go
+++ b/route/sys_freebsd.go
@@ -11,7 +11,7 @@
 
 func (typ RIBType) parseable() bool { return true }
 
-// A RouteMetrics represents route metrics.
+// RouteMetrics represents route metrics.
 type RouteMetrics struct {
 	PathMTU int // path maximum transmission unit
 }
@@ -35,7 +35,7 @@
 	}
 }
 
-// A InterfaceMetrics represents interface metrics.
+// InterfaceMetrics represents interface metrics.
 type InterfaceMetrics struct {
 	Type int // interface type
 	MTU  int // maximum transmission unit
diff --git a/route/sys_netbsd.go b/route/sys_netbsd.go
index b4e3301..02f71d5 100644
--- a/route/sys_netbsd.go
+++ b/route/sys_netbsd.go
@@ -6,7 +6,7 @@
 
 func (typ RIBType) parseable() bool { return true }
 
-// A RouteMetrics represents route metrics.
+// RouteMetrics represents route metrics.
 type RouteMetrics struct {
 	PathMTU int // path maximum transmission unit
 }
@@ -23,7 +23,7 @@
 	}
 }
 
-// A InterfaceMetrics represents interface metrics.
+// RouteMetrics represents route metrics.
 type InterfaceMetrics struct {
 	Type int // interface type
 	MTU  int // maximum transmission unit
diff --git a/route/sys_openbsd.go b/route/sys_openbsd.go
index 8798dc4..19fc025 100644
--- a/route/sys_openbsd.go
+++ b/route/sys_openbsd.go
@@ -15,7 +15,7 @@
 	}
 }
 
-// A RouteMetrics represents route metrics.
+// RouteMetrics represents route metrics.
 type RouteMetrics struct {
 	PathMTU int // path maximum transmission unit
 }
@@ -32,7 +32,7 @@
 	}
 }
 
-// A InterfaceMetrics represents interface metrics.
+// InterfaceMetrics represents interface metrics.
 type InterfaceMetrics struct {
 	Type int // interface type
 	MTU  int // maximum transmission unit