diff --git a/modules/juce_core/threads/juce_CriticalSection.h b/modules/juce_core/threads/juce_CriticalSection.h
index de043a3f59..2baa4d113a 100644
--- a/modules/juce_core/threads/juce_CriticalSection.h
+++ b/modules/juce_core/threads/juce_CriticalSection.h
@@ -118,9 +118,9 @@ private:
     // a block of memory here that's big enough to be used internally as a windows
     // CRITICAL_SECTION structure.
     #if JUCE_64BIT
-     std::aligned_storage_t<44, 8> lock;
+     alignas (8) std::byte lock[44];
     #else
-     std::aligned_storage_t<24, 8> lock;
+     alignas (8) std::byte lock[24];
     #endif
    #else
     mutable pthread_mutex_t lock;