diff --git a/src/client/client.pro b/src/client/client.pro
index ef3cff054fcac2a4d8ad2e7768a1b8203b7086d7..00e9cd04a97ff7738b7f3aa6bbad68a7d171e1d9 100644
--- a/src/client/client.pro
+++ b/src/client/client.pro
@@ -10,6 +10,9 @@ MODULE_PLUGIN_TYPES = \
 
 load(qt_module)
 
+# We have a bunch of C code with casts, so we can't have this option
+QMAKE_CXXFLAGS_WARN_ON -= -Wcast-qual
+
 CONFIG -= precompile_header
 CONFIG -= create_cmake
 CONFIG += link_pkgconfig qpa/genericunixfontdatabase wayland-scanner
diff --git a/src/plugins/hardwareintegration/client/drm-egl-server/drm-egl-server.pro b/src/plugins/hardwareintegration/client/drm-egl-server/drm-egl-server.pro
index 3a57958683d342930ba883ef6e8a339e48f19f8e..3c069b7dd9495d717c04cc9f9aaa67818338a8d1 100644
--- a/src/plugins/hardwareintegration/client/drm-egl-server/drm-egl-server.pro
+++ b/src/plugins/hardwareintegration/client/drm-egl-server/drm-egl-server.pro
@@ -1,6 +1,9 @@
 PLUGIN_TYPE = wayland-graphics-integration-client
 load(qt_plugin)
 
+# We have a bunch of C code with casts, so we can't have this option
+QMAKE_CXXFLAGS_WARN_ON -= -Wcast-qual
+
 QT += waylandclient-private
 
 include(../../../../hardwareintegration/client/drm-egl-server/drm-egl-server.pri)
diff --git a/src/plugins/hardwareintegration/client/xcomposite-egl/xcomposite-egl.pro b/src/plugins/hardwareintegration/client/xcomposite-egl/xcomposite-egl.pro
index 97e642fbb66e61607780fd36e7b103a2dc09bd1a..1af1786695f6ae518923350f7e661b91f40151f9 100644
--- a/src/plugins/hardwareintegration/client/xcomposite-egl/xcomposite-egl.pro
+++ b/src/plugins/hardwareintegration/client/xcomposite-egl/xcomposite-egl.pro
@@ -1,6 +1,9 @@
 PLUGIN_TYPE = wayland-graphics-integration-client
 load(qt_plugin)
 
+# We have a bunch of C code with casts, so we can't have this option
+QMAKE_CXXFLAGS_WARN_ON -= -Wcast-qual
+
 QT += waylandclient-private
 
 include(../../../../hardwareintegration/client/xcomposite-egl/xcomposite-egl.pri)