diff --git a/sys/amd64/include/cpufunc.h b/sys/amd64/include/cpufunc.h
index 317af1bd6a2e..fef36e00a4d6 100644
--- a/sys/amd64/include/cpufunc.h
+++ b/sys/amd64/include/cpufunc.h
@@ -50,10 +50,6 @@
 
 #ifdef	__GNUC__
 
-#ifdef SMP
-#include <machine/lock.h>		/* XXX */
-#endif
-
 #ifdef SWTCH_OPTIM_STATS
 extern	int	tlb_flush_count;	/* XXX */
 #endif
diff --git a/sys/i386/include/cpufunc.h b/sys/i386/include/cpufunc.h
index 317af1bd6a2e..fef36e00a4d6 100644
--- a/sys/i386/include/cpufunc.h
+++ b/sys/i386/include/cpufunc.h
@@ -50,10 +50,6 @@
 
 #ifdef	__GNUC__
 
-#ifdef SMP
-#include <machine/lock.h>		/* XXX */
-#endif
-
 #ifdef SWTCH_OPTIM_STATS
 extern	int	tlb_flush_count;	/* XXX */
 #endif