diff --git a/src/lms/ui/common/UppercaseValidator.cpp b/src/lms/ui/common/UppercaseValidator.cpp
index 3e6cdcbf..b103dd74 100644
--- a/src/lms/ui/common/UppercaseValidator.cpp
+++ b/src/lms/ui/common/UppercaseValidator.cpp
@@ -19,6 +19,7 @@
 
 #include "UppercaseValidator.hpp"
 
+#include <algorithm>
 #include <string>
 #include <string_view>