diff --git a/src/system.c b/src/system.c
index 261d82d..42ff2d3 100644
--- a/src/system.c
+++ b/src/system.c
@@ -206,6 +206,26 @@ cpu_count(void)
    return cores;
 }
 
+int
+system_cpu_online_count_get(void)
+{
+#if defined(__linux__)
+   return cpu_count();
+#endif
+   static int cores = 0;
+
+   if (cores != 0) return cores;
+
+   size_t len;
+   int mib[2] = { CTL_HW, HW_NCPUONLINE };
+
+   len = sizeof(cores);
+   if (sysctl(mib, 2, &cores, &len, NULL, 0) < 0)
+     return cpu_count();
+
+   return cores;
+}
+
 static void
 _cpu_state_get(cpu_core_t **cores, int ncpu)
 {
diff --git a/src/system.h b/src/system.h
index 3f98a70..e7d2527 100644
--- a/src/system.h
+++ b/src/system.h
@@ -74,4 +74,7 @@ int
 void
  system_power_state_get(power_t *power);
 
+int
+ system_cpu_online_count_get();
+
 #endif
diff --git a/src/ui.c b/src/ui.c
index 83bc79f..5fdac0b 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -434,7 +434,7 @@ _system_stats_feedback_cb(void *data, Ecore_Thread *thread, void *msg)
         free(results->cores[i]);
      }
 
-   cpu_usage = cpu_usage / results->cpu_count;
+   cpu_usage = cpu_usage / system_cpu_online_count_get();
 
    _progressbar_value_force_set(ui->progress_cpu, (double)cpu_usage / 100);