diff --git a/qemu/target-i386/cpu.c b/qemu/target-i386/cpu.c
index 5a937f81..9cff1e96 100644
--- a/qemu/target-i386/cpu.c
+++ b/qemu/target-i386/cpu.c
@@ -1447,7 +1447,7 @@ static void report_unavailable_features(FeatureWord w, uint32_t mask)
     int i;
 
     for (i = 0; i < 32; ++i) {
-        if (1 << i & mask) {
+        if ((1UL << i) & mask) {
             const char *reg = get_register_name_32(f->cpuid_reg);
             assert(reg);
             fprintf(stderr, "warning: %s doesn't support requested feature: "