diff --git a/src/mainboard/lenovo/t400/dock.h b/src/mainboard/lenovo/t400/dock.h
index ac6d81a499..74b730ca23 100644
--- a/src/mainboard/lenovo/t400/dock.h
+++ b/src/mainboard/lenovo/t400/dock.h
@@ -16,7 +16,7 @@
 #ifndef THINKPAD_T400_DOCK_H
 #define THINKPAD_T400_DOCK_H
 
-extern void dock_connect(void);
-extern void dock_disconnect(void);
-extern int dock_present(void);
+void dock_connect(void);
+void dock_disconnect(void);
+int dock_present(void);
 #endif
diff --git a/src/mainboard/lenovo/t60/dock.h b/src/mainboard/lenovo/t60/dock.h
index ce8c98e0a8..6a9efc2ef9 100644
--- a/src/mainboard/lenovo/t60/dock.h
+++ b/src/mainboard/lenovo/t60/dock.h
@@ -16,11 +16,11 @@
 #ifndef THINKPAD_X60_DOCK_H
 #define THINKPAD_X60_DOCK_H
 
-extern int dock_connect(void);
-extern void dock_disconnect(void);
-extern int dock_present(void);
-extern int dlpc_init(void);
+int dock_connect(void);
+void dock_disconnect(void);
+int dock_present(void);
+int dlpc_init(void);
 
-extern int legacy_io_present(void);
-extern void legacy_io_init(void);
+int legacy_io_present(void);
+void legacy_io_init(void);
 #endif
diff --git a/src/mainboard/lenovo/x200/dock.h b/src/mainboard/lenovo/x200/dock.h
index fef0bf34ce..56f3fe0f7a 100644
--- a/src/mainboard/lenovo/x200/dock.h
+++ b/src/mainboard/lenovo/x200/dock.h
@@ -16,7 +16,7 @@
 #ifndef THINKPAD_X200_DOCK_H
 #define THINKPAD_X200_DOCK_H
 
-extern void dock_connect(void);
-extern void dock_disconnect(void);
-extern int dock_present(void);
+void dock_connect(void);
+void dock_disconnect(void);
+int dock_present(void);
 #endif
diff --git a/src/mainboard/lenovo/x201/dock.h b/src/mainboard/lenovo/x201/dock.h
index 1af1b3dac3..4cd8c857a8 100644
--- a/src/mainboard/lenovo/x201/dock.h
+++ b/src/mainboard/lenovo/x201/dock.h
@@ -16,7 +16,7 @@
 #ifndef THINKPAD_X201_DOCK_H
 #define THINKPAD_X201_DOCK_H
 
-extern void dock_connect(void);
-extern void dock_disconnect(void);
-extern int dock_present(void);
+void dock_connect(void);
+void dock_disconnect(void);
+int dock_present(void);
 #endif
diff --git a/src/mainboard/lenovo/x60/dock.h b/src/mainboard/lenovo/x60/dock.h
index ef8a97744b..a8911ddf04 100644
--- a/src/mainboard/lenovo/x60/dock.h
+++ b/src/mainboard/lenovo/x60/dock.h
@@ -16,9 +16,9 @@
 #ifndef THINKPAD_X60_DOCK_H
 #define THINKPAD_X60_DOCK_H
 
-extern int dock_connect(void);
-extern void dock_disconnect(void);
-extern int dock_present(void);
-extern int dlpc_init(void);
-extern int dock_ultrabay_device_present(void);
+int dock_connect(void);
+void dock_disconnect(void);
+int dock_present(void);
+int dlpc_init(void);
+int dock_ultrabay_device_present(void);
 #endif