diff --git a/hw/mips/boston.c b/hw/mips/boston.c
index b6dd9fb200..a9d87f3437 100644
--- a/hw/mips/boston.c
+++ b/hw/mips/boston.c
@@ -515,7 +515,7 @@ static const void *create_fdt(BostonState *s,
 {
     void *fdt;
     int cpu;
-    MachineState *mc = s->mach;
+    MachineState *ms = s->mach;
     uint32_t platreg_ph, gic_ph, clk_ph;
     char *name, *gic_name, *platreg_name, *stdout_name;
     static const char * const syscon_compat[2] = {
@@ -542,7 +542,7 @@ static const void *create_fdt(BostonState *s,
     qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0x0);
     qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 0x1);
 
-    for (cpu = 0; cpu < mc->smp.cpus; cpu++) {
+    for (cpu = 0; cpu < ms->smp.cpus; cpu++) {
         name = g_strdup_printf("/cpus/cpu@%d", cpu);
         qemu_fdt_add_subnode(fdt, name);
         qemu_fdt_setprop_string(fdt, name, "compatible", "img,mips");