diff --git a/src/system/kernel/scheduler/scheduler_thread.cpp b/src/system/kernel/scheduler/scheduler_thread.cpp
index d778b35c43..29d3ae2975 100644
--- a/src/system/kernel/scheduler/scheduler_thread.cpp
+++ b/src/system/kernel/scheduler/scheduler_thread.cpp
@@ -194,7 +194,9 @@ ThreadData::ComputeQuantum() const
 	if (IsRealTime())
 		return quantum;
 
-	int32 threadCount = fCore->ThreadCount() / fCore->CPUCount();
+	int32 threadCount = fCore->ThreadCount();
+	if (fCore->CPUCount() > 0)
+		threadCount /= fCore->CPUCount();
 	if (threadCount >= 1) {
 		quantum
 			= std::min(gCurrentMode->maximum_latency / threadCount, quantum);