diff --git a/src/plugins/platforms/wayland/qwaylanddatacontrolv1.cpp b/src/plugins/platforms/wayland/qwaylanddatacontrolv1.cpp
index 1d3a8e33898..33f49e2cb03 100644
--- a/src/plugins/platforms/wayland/qwaylanddatacontrolv1.cpp
+++ b/src/plugins/platforms/wayland/qwaylanddatacontrolv1.cpp
@@ -10,6 +10,8 @@
 
 #include <qpa/qplatformclipboard.h>
 
+#include <signal.h>
+
 QT_BEGIN_NAMESPACE
 
 namespace QtWaylandClient {
diff --git a/src/plugins/platforms/wayland/qwaylandprimaryselectionv1.cpp b/src/plugins/platforms/wayland/qwaylandprimaryselectionv1.cpp
index d72b8f74930..c38193e3bfb 100644
--- a/src/plugins/platforms/wayland/qwaylandprimaryselectionv1.cpp
+++ b/src/plugins/platforms/wayland/qwaylandprimaryselectionv1.cpp
@@ -10,6 +10,8 @@
 
 #include <qpa/qplatformclipboard.h>
 
+#include <signal.h>
+
 QT_BEGIN_NAMESPACE
 
 namespace QtWaylandClient {