diff --git a/sys/i386/include/sysarch.h b/sys/i386/include/sysarch.h
index 316a5ab0f046..11dca3bef7b1 100644
--- a/sys/i386/include/sysarch.h
+++ b/sys/i386/include/sysarch.h
@@ -49,12 +49,6 @@
 #define I386_SET_GSBASE	10
 #define	I386_GET_XFPUSTATE 11
 
-/* These four only exist when running an i386 binary on amd64 */
-#define	_AMD64_GET_FSBASE	128
-#define	_AMD64_SET_FSBASE	129
-#define	_AMD64_GET_GSBASE	130
-#define	_AMD64_SET_GSBASE	131
-
 struct i386_ldt_args {
 	unsigned int start;
 	union	descriptor *descs;
@@ -84,11 +78,6 @@ union descriptor;
 struct dbreg;
 
 __BEGIN_DECLS
-/* These four only exist when running an i386 binary on amd64 */
-int _amd64_get_fsbase(void **);
-int _amd64_get_gsbase(void **);
-int _amd64_set_fsbase(void *);
-int _amd64_set_gsbase(void *);
 int i386_get_ldt(int, union descriptor *, int);
 int i386_set_ldt(int, union descriptor *, int);
 int i386_get_ioperm(unsigned int, unsigned int *, int *);