diff --git a/qt6-after/qt6-migrated-legatus/Lts/Viewer/SituationMap/CMakeLists.txt b/qt6-after/qt6-migrated-legatus/Lts/Viewer/SituationMap/CMakeLists.txt
index af3ed2062..b3d20fef1 100755
--- a/qt6-after/qt6-migrated-legatus/Lts/Viewer/SituationMap/CMakeLists.txt
+++ b/qt6-after/qt6-migrated-legatus/Lts/Viewer/SituationMap/CMakeLists.txt
@@ -440,6 +440,9 @@ NGL_TARGET_LINK_LIBRARIES(situationMap
     ngltools
 )
 
+# GRAPHICSVIEW_SUPPORTED required for MapGraphicsView.h (ArcGIS SDK)
+TARGET_COMPILE_DEFINITIONS(situationMap PRIVATE GRAPHICSVIEW_SUPPORTED)
+
 # Copy on LIBchanges:
 IF(TARGET situationMap)
   SET(SYMBOLE_CSV symbole2.csv)