diff --git a/modules/juce_core/maths/juce_Random.cpp b/modules/juce_core/maths/juce_Random.cpp
index 020252a13d..86b82e9f48 100644
--- a/modules/juce_core/maths/juce_Random.cpp
+++ b/modules/juce_core/maths/juce_Random.cpp
@@ -58,7 +58,7 @@ void Random::combineSeed (const int64 seedValue) noexcept
 
 void Random::setSeedRandomly()
 {
-    static int64 globalSeed = 0;
+    static std::atomic<int64> globalSeed { 0 };
 
     combineSeed (globalSeed ^ (int64) (pointer_sized_int) this);
     combineSeed (Time::getMillisecondCounter());