diff --git a/include/audacity/EffectAutomationParameters.h b/include/audacity/EffectAutomationParameters.h
index a54c9766a..91148c315 100644
--- a/include/audacity/EffectAutomationParameters.h
+++ b/include/audacity/EffectAutomationParameters.h
@@ -48,6 +48,7 @@
 #include <wx/cmdline.h>
 #include <wx/fileconf.h>
 #include <wx/intl.h>
+#include <algorithm>
 
 
 /**