diff --git a/README.md b/README.md
index 2846449..17e989a 100644
--- a/README.md
+++ b/README.md
@@ -412,8 +412,8 @@ script-run = once
 color = 13
 
 [usb devices]
-pattern = usb([0-9]*)
-device = /dev/ttyUSB%s
+pattern = ^usb([0-9]*)
+device = /dev/ttyUSB%m1
 color = 14
 ```
 
diff --git a/examples/config/config b/examples/config/config
index df32b8d..1d18e89 100644
--- a/examples/config/config
+++ b/examples/config/config
@@ -56,8 +56,8 @@ log-strip = true
 color = 11
 
 [usb]
-pattern = usb([0-9]*)
-device = /dev/ttyUSB%s
+pattern = ^usb([0-9]*)
+device = /dev/ttyUSB%m1
 color = 12
 
 [rs-485-device]
diff --git a/man/tio.1.in b/man/tio.1.in
index 93840c0..108bd3b 100644
--- a/man/tio.1.in
+++ b/man/tio.1.in
@@ -622,7 +622,7 @@ regular expressions:
 .nf
 .eo
 [usb device]
-pattern = usb([0-9]*)
+pattern = ^usb([0-9]*)
 device = /dev/ttyUSB%m1
 baudrate = 115200
 .ec