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-rw-r--r--src/plugins/platforms/xcb/xcb-plugin.pro1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/plugins/platforms/xcb/xcb-plugin.pro b/src/plugins/platforms/xcb/xcb-plugin.pro
index 341c33e8e6..4f69ca8aab 100644
--- a/src/plugins/platforms/xcb/xcb-plugin.pro
+++ b/src/plugins/platforms/xcb/xcb-plugin.pro
@@ -74,6 +74,7 @@ contains(QT_CONFIG, xcb-render) {
# build with session management support
contains(QT_CONFIG, xcb-sm) {
+ DEFINES += XCB_USE_SM
LIBS += -lSM -lICE
SOURCES += qxcbsessionmanager.cpp
HEADERS += qxcbsessionmanager.h