--- a/modules/juce_core/containers/juce_FixedSizeFunction_test.cpp
+++ b/modules/juce_core/containers/juce_FixedSizeFunction_test.cpp
@@ -23,6 +23,7 @@
   ==============================================================================
 */

+#include <tuple>
 #if JUCE_ENABLE_ALLOCATION_HOOKS
 #define JUCE_FAIL_ON_ALLOCATION_IN_SCOPE const UnitTestAllocationChecker checker (*this)
 #else