diff --git a/CMakeLists.txt b/CMakeLists.txt
index e53f35b..cc50178 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,7 +9,7 @@ set(META_APP_URL "https://github.com/${META_APP_AUTHOR}/${META_PROJECT_NAME}")
 set(META_APP_DESCRIPTION "Common Qt related C++ classes and routines used by my applications such as dialogs, widgets and models")
 set(META_VERSION_MAJOR 5)
 set(META_VERSION_MINOR 7)
-set(META_VERSION_PATCH 0)
+set(META_VERSION_PATCH 1)
 set(META_APP_VERSION ${META_VERSION_MAJOR}.${META_VERSION_MINOR}.${META_VERSION_PATCH})
 
 # add project files
diff --git a/widgets/pathselection.cpp b/widgets/pathselection.cpp
index fe3de6d..8dd7d52 100644
--- a/widgets/pathselection.cpp
+++ b/widgets/pathselection.cpp
@@ -16,6 +16,7 @@
 #include <QContextMenuEvent>
 #endif
 
+#include <functional>
 #include <memory>
 
 using namespace std;