diff --git a/libraries/AP_RAMTRON/AP_RAMTRON.cpp b/libraries/AP_RAMTRON/AP_RAMTRON.cpp
index c46b4f6dc6..28f6169ac3 100644
--- a/libraries/AP_RAMTRON/AP_RAMTRON.cpp
+++ b/libraries/AP_RAMTRON/AP_RAMTRON.cpp
@@ -5,7 +5,6 @@
  */
 
 #include "AP_RAMTRON.h"
-#include <AP_Common/Semaphore.h>
 
 extern const AP_HAL::HAL &hal;