diff -Naur a/gmic-qt/src/Widgets/SearchFieldWidget.cpp b/gmic-qt/src/Widgets/SearchFieldWidget.cpp
--- a/gmic-qt/src/Widgets/SearchFieldWidget.cpp	2018-05-16 14:18:08.000000000 +0100
+++ b/gmic-qt/src/Widgets/SearchFieldWidget.cpp	2018-06-03 03:25:31.593559687 +0100
@@ -23,6 +23,9 @@
  *
  */
 #include "Widgets/SearchFieldWidget.h"
+#if QT_VERSION >= 0x050B00
+#include <QAction>
+#endif
 #include <QFrame>
 #include <QHBoxLayout>
 #include <QIcon>