diff --git a/source/ui7/container/dragdata.cpp b/source/ui7/container/dragdata.cpp
index 06cde42..85e67ee 100755
--- a/source/ui7/container/dragdata.cpp
+++ b/source/ui7/container/dragdata.cpp
@@ -24,6 +24,7 @@ SOFTWARE.
 #include <pd/ui7/container/dragdata.hpp>
 #include <pd/ui7/container/label.hpp>
 #include <type_traits>
+#include <algorithm>
 
 namespace PD {
 namespace UI7 {
diff --git a/source/ui7/container/slider.cpp b/source/ui7/container/slider.cpp
index 7f82e6b..a6fdcce 100644
--- a/source/ui7/container/slider.cpp
+++ b/source/ui7/container/slider.cpp
@@ -24,6 +24,7 @@ SOFTWARE.
 #include <pd/ui7/container/label.hpp>
 #include <pd/ui7/container/slider.hpp>
 #include <type_traits>
+#include <algorithm>
 
 namespace PD {
 namespace UI7 {
diff --git a/source/ui7/menu.cpp b/source/ui7/menu.cpp
index 17ae294..ea4e325 100644
--- a/source/ui7/menu.cpp
+++ b/source/ui7/menu.cpp
@@ -23,6 +23,7 @@ SOFTWARE.
 
 #include <pd/ui7/containers.hpp>
 #include <pd/ui7/menu.hpp>
+#include <algorithm>
 
 namespace PD {
 namespace UI7 {