diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 2f16d9dcce..555a007e38 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -81,7 +81,7 @@
 
 #define TIMEBASE_FREQ           512000000ULL
 
-#define MAX_CPUS                256
+#define MAX_CPUS                255
 
 #define PHANDLE_XICP            0x00001111