diff --git a/sys/kern/kern_lock.c b/sys/kern/kern_lock.c
index e3166191e351..d20fd2dd9133 100644
--- a/sys/kern/kern_lock.c
+++ b/sys/kern/kern_lock.c
@@ -55,7 +55,6 @@ __FBSDID("$FreeBSD$");
 #ifdef DEBUG_LOCKS
 #include <sys/stack.h>
 #endif
-#include <sys/kdb.h>
 
 /*
  * Locking primitives implementation.