diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 0f848d6dddc9c..3115caa7d7d0e 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -389,13 +389,20 @@ static int __init uv_set_system_type(char *_oem_id, char *_oem_table_id)
 			/* (Not hubless), not a UV */
 			return 0;
 
+		/* Is UV hubless system */
+		uv_hubless_system = 0x01;
+
+		/* UV5 Hubless */
+		if (strncmp(uv_archtype, "NSGI5", 5) == 0)
+			uv_hubless_system |= 0x20;
+
 		/* UV4 Hubless: CH */
-		if (strncmp(uv_archtype, "NSGI4", 5) == 0)
-			uv_hubless_system = 0x11;
+		else if (strncmp(uv_archtype, "NSGI4", 5) == 0)
+			uv_hubless_system |= 0x10;
 
 		/* UV3 Hubless: UV300/MC990X w/o hub */
 		else
-			uv_hubless_system = 0x9;
+			uv_hubless_system |= 0x8;
 
 		/* Copy APIC type */
 		uv_stringify(sizeof(oem_table_id), oem_table_id, _oem_table_id);