diff -Naur kicad-5.1.5-orig/common/lib_tree_model.cpp kicad-5.1.5/common/lib_tree_model.cpp
--- kicad-5.1.5-orig/common/lib_tree_model.cpp  2020-05-11 00:36:36.568301297 +0200
+++ kicad-5.1.5/common/lib_tree_model.cpp       2020-05-11 00:37:50.472359703 +0200
@@ -21,6 +21,7 @@

 #include <lib_tree_model.h>

+#include <algorithm>
 #include <eda_pattern_match.h>
 #include <lib_tree_item.h>
 #include <make_unique.h>