diff --git a/mapmap.pro b/mapmap.pro
index e361b5b..9a72dc4 100644
--- a/mapmap.pro
+++ b/mapmap.pro
@@ -44,6 +44,7 @@ system($$QMAKE_LRELEASE mapmap.pro) # Run lrelease
 # Linux-specific:
 unix:!macx {
 QMAKE_CXXFLAGS += -D_GLIBCXX_USE_CXX11_ABI=0
+QMAKE_CXXFLAGS += -Wno-expansion-to-defined
 #  mapmapfile.files = mapmap
 #  mapmapfile.path = /usr/bin
 #  INSTALLS += mapmapfile