diff --git a/src/util/u_cpu_detect.c b/src/util/u_cpu_detect.c
index ae711aae14f..955d087b8ea 100644
--- a/src/util/u_cpu_detect.c
+++ b/src/util/u_cpu_detect.c
@@ -497,8 +497,7 @@ get_cpu_topology(void)
        *
        * Loop over all possible CPUs even though some may be offline.
        */
-      for (unsigned i = 0; i < util_cpu_caps.max_cpus && i < UTIL_MAX_CPUS;
-           i++) {
+      for (int16_t i = 0; i < util_cpu_caps.max_cpus && i < UTIL_MAX_CPUS; i++) {
          uint32_t cpu_bit = 1u << (i % 32);
 
          mask[i / 32] = cpu_bit;