diff --git a/resources/text/CHANGELOG b/resources/text/CHANGELOG
index de60cf3da..c2bae4744 100644
--- a/resources/text/CHANGELOG
+++ b/resources/text/CHANGELOG
@@ -1,3 +1,9 @@
+3.4.3
+—————
+
+Fixed:
+▪ Fixed build on some Unit-like operating systems.
+
 3.4.2
 —————
 
@@ -9,7 +15,6 @@ Added:
 ▪ New SSL libraries.
 ▪ Binaries are now compiled on x64-only mode for Windows!!!
 
-
 3.4.1
 —————
 
diff --git a/src/gui/systemtrayicon.h b/src/gui/systemtrayicon.h
index 46e4a8c72..eaf6b72bb 100755
--- a/src/gui/systemtrayicon.h
+++ b/src/gui/systemtrayicon.h
@@ -25,6 +25,8 @@
 #include <QPixmap>
 #include <QMenu>
 
+#include <functional>
+
 
 class FormMain;
 class QEvent;