diff --git a/lib/libZRCola/include/zrcola/character.h b/lib/libZRCola/include/zrcola/character.h
index 53aa129..1ae1213 100644
--- a/lib/libZRCola/include/zrcola/character.h
+++ b/lib/libZRCola/include/zrcola/character.h
@@ -22,6 +22,7 @@
 #include "common.h"
 
 #include <stdex/idrec.h>
+#include <algorithm>
 #include <istream>
 #include <map>
 #include <ostream>
diff --git a/lib/libZRCola/include/zrcola/translate.h b/lib/libZRCola/include/zrcola/translate.h
index 2be2d20..befe78b 100644
--- a/lib/libZRCola/include/zrcola/translate.h
+++ b/lib/libZRCola/include/zrcola/translate.h
@@ -23,6 +23,7 @@
 #include "language.h"
 
 #include <stdex/idrec.h>
+#include <algorithm>
 #include <istream>
 #include <ostream>
 #include <vector>
diff --git a/lib/libZRColaUI/include/zrcolaui/chargroup.h b/lib/libZRColaUI/include/zrcolaui/chargroup.h
index 983e882..47708fa 100644
--- a/lib/libZRColaUI/include/zrcolaui/chargroup.h
+++ b/lib/libZRColaUI/include/zrcolaui/chargroup.h
@@ -24,6 +24,7 @@
 
 #include <stdex/idrec.h>
 #include <assert.h>
+#include <algorithm>
 #include <istream>
 #include <ostream>
 #include <vector>