diff --git a/sys/alpha/include/param.h b/sys/alpha/include/param.h
index 5a286f43df0b..d75b932dd00a 100644
--- a/sys/alpha/include/param.h
+++ b/sys/alpha/include/param.h
@@ -91,8 +91,9 @@
 #include <machine/alpha_cpu.h>
 #include <machine/cpu.h>
 
+#define MAXSMPCPU	8
 #ifdef SMP
-#define MAXCPU		32
+#define MAXCPU		MAXSMPCPU
 #else
 #define MAXCPU		1
 #endif
diff --git a/sys/alpha/include/pmap.h b/sys/alpha/include/pmap.h
index 01b29d571920..981bea34cece 100644
--- a/sys/alpha/include/pmap.h
+++ b/sys/alpha/include/pmap.h
@@ -177,7 +177,7 @@ struct pmap {
 	struct {
 		u_int32_t	asn:ASN_BITS;	/* address space number */
 		u_int32_t	gen:ASNGEN_BITS; /* generation number */
-	}			pm_asn[MAXCPU];
+	}			pm_asn[MAXSMPCPU];
 	struct pmap_statistics	pm_stats;	/* pmap statistics */
 	struct	vm_page		*pm_ptphint;	/* pmap ptp hint */
 	LIST_ENTRY(pmap)	pm_list;	/* list of all pmaps. */