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-rw-r--r--examples/perfcounter/perf_writer.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/examples/perfcounter/perf_writer.c b/examples/perfcounter/perf_writer.c
index 04127f5621..00e47bdaba 100644
--- a/examples/perfcounter/perf_writer.c
+++ b/examples/perfcounter/perf_writer.c
@@ -26,7 +26,7 @@ sig_atomic_t keep_running = TRUE;
/* allocates memory and gets numCPUs, total memory, and PerfFreq, number of disks... */
void get_constants(PERF_DATA_BLOCK *data)
{
- data->cpuInfo.numCPUs = sysconf(_SC_NPROCESSORS_ONLN);
+ data->cpuInfo.numCPUs = sysconf(_SC_NPROCESSORS_ONLN) > 0 ? sysconf(_SC_NPROCESSORS_ONLN) : 1;
data->PerfFreq = sysconf(_SC_CLK_TCK);
init_mem_data(data);
init_cpu_data(data);