diff --git a/sys/ia64/ia64/interrupt.c b/sys/ia64/ia64/interrupt.c
index de89f7787021..fb33a44d3c57 100644
--- a/sys/ia64/ia64/interrupt.c
+++ b/sys/ia64/ia64/interrupt.c
@@ -68,8 +68,10 @@ struct evcnt clock_intr_evcnt;	/* event counter for clock intrs. */
 #include <ddb/ddb.h>
 #endif
 
+#ifdef SMP
 extern int mp_ipi_vector[];		/* XXX */
 extern int mp_ipi_test;
+#endif
 
 volatile int mc_expected, mc_received;
 
@@ -117,8 +119,10 @@ interrupt(u_int64_t vector, struct trapframe *framep)
 		/* divide hz (1024) by 8 to get stathz (128) */
 		if((++schedclk2 & 0x7) == 0)
 			statclock((struct clockframe *)framep);
+#ifdef SMP
 	} else if (vector == mp_ipi_vector[IPI_TEST]) {
 		mp_ipi_test++;
+#endif
 	} else
 		ia64_dispatch_intr(framep, vector);
 
diff --git a/sys/ia64/ia64/locore.S b/sys/ia64/ia64/locore.S
index 5cd1724a9f3b..727f8219fa58 100644
--- a/sys/ia64/ia64/locore.S
+++ b/sys/ia64/ia64/locore.S
@@ -143,6 +143,8 @@ ENTRY(mi_startup_trampoline, 0)
 
 END(mi_startup_trampoline)
 
+#ifdef SMP
+
 /*
  * AP wake-up entry point. The handoff state is similar as for the BSP,
  * as described on page 3-9 of the IPF SAL Specification. The difference
@@ -193,6 +195,8 @@ ENTRY(os_boot_rendez,0)
 	/* NOT REACHED */
 END(os_boot_rendez)
 
+#endif /* !SMP */
+
 /**************************************************************************/
 
 /*
diff --git a/sys/ia64/ia64/locore.s b/sys/ia64/ia64/locore.s
index 5cd1724a9f3b..727f8219fa58 100644
--- a/sys/ia64/ia64/locore.s
+++ b/sys/ia64/ia64/locore.s
@@ -143,6 +143,8 @@ ENTRY(mi_startup_trampoline, 0)
 
 END(mi_startup_trampoline)
 
+#ifdef SMP
+
 /*
  * AP wake-up entry point. The handoff state is similar as for the BSP,
  * as described on page 3-9 of the IPF SAL Specification. The difference
@@ -193,6 +195,8 @@ ENTRY(os_boot_rendez,0)
 	/* NOT REACHED */
 END(os_boot_rendez)
 
+#endif /* !SMP */
+
 /**************************************************************************/
 
 /*
diff --git a/sys/ia64/ia64/sal.c b/sys/ia64/ia64/sal.c
index 611877134383..ef591156695b 100644
--- a/sys/ia64/ia64/sal.c
+++ b/sys/ia64/ia64/sal.c
@@ -99,6 +99,7 @@ ia64_sal_init(struct sal_system_table *saltab)
 			if (bootverbose)
 				printf("SMP: AP wake-up vector: 0x%lx\n",
 				    dp->sale_vector);
+#ifdef SMP
 			for (ipi = 0; ipi < IPI_COUNT; ipi++)
 				mp_ipi_vector[ipi] = dp->sale_vector + ipi;
 
@@ -108,6 +109,7 @@ ia64_sal_init(struct sal_system_table *saltab)
 			    0, 0, 0);
 
 			mp_hardware = 1;
+#endif
 			break;
 		}
 		}