diff --git a/src/map/CMakeLists.txt b/src/map/CMakeLists.txt
index 489df86..1eebb4f 100644
--- a/src/map/CMakeLists.txt
+++ b/src/map/CMakeLists.txt
@@ -1,42 +1,43 @@
 flex_target(mapcssscanner
     style/mapcsslexer.l
     ${CMAKE_CURRENT_BINARY_DIR}/mapcsslexer.cpp
     DEFINES_FILE ${CMAKE_CURRENT_BINARY_DIR}/mapcssscanner.h
+    COMPILE_FLAGS "--nounistd"
 )
 bison_target(mapcssparser
     style/mapcssparser.y
     ${CMAKE_CURRENT_BINARY_DIR}/mapcssparser_p.cpp
     DEFINES_FILE ${CMAKE_CURRENT_BINARY_DIR}/mapcssparser_p.h
 )
 add_flex_bison_dependency(mapcssscanner mapcssparser)
 
 add_library(KOSMIndoorMap STATIC
     assets/assets.qrc
 
     loader/mapdata.cpp
     loader/maploader.cpp
 
     renderer/painterrenderer.cpp
     renderer/view.cpp
 
     scene/scenecontroller.cpp
     scene/scenegraph.cpp
     scene/scenegraphitem.cpp
 
     style/mapcsscondition.cpp
     style/mapcssdeclaration.cpp
     style/mapcssparser.cpp
     style/mapcssresult.cpp
     style/mapcssrule.cpp
     style/mapcssselector.cpp
     style/mapcssstate.cpp
     style/mapcssstyle.cpp
     ${BISON_mapcssparser_OUTPUTS}
     ${FLEX_mapcssscanner_OUTPUTS}
 )
 
 target_include_directories(KOSMIndoorMap PRIVATE $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>)
 target_include_directories(KOSMIndoorMap PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/..>)
 target_link_libraries(KOSMIndoorMap
     PUBLIC Qt5::Gui KOSM
 )