diff --git a/src/ifcgeom/IfcGeomFunctions.cpp b/src/ifcgeom/IfcGeomFunctions.cpp
index 1fba0a20cd..18671997a7 100644
--- a/src/ifcgeom/IfcGeomFunctions.cpp
+++ b/src/ifcgeom/IfcGeomFunctions.cpp
@@ -167,7 +167,7 @@
 #ifdef _MSC_VER
 #pragma message("warning: You are linking against Open CASCADE version " OCC_VERSION_COMPLETE ". Version 6.9.0 introduces various improvements with relation to boolean operations. You are advised to upgrade.")
 #else
-#warning "You are linking against linking against an older version of Open CASCADE. Version 6.9.0 introduces various improvements with relation to boolean operations. You are advised to upgrade."
+#warning "You are linking against an older version of Open CASCADE. Version 6.9.0 introduces various improvements with relation to boolean operations. You are advised to upgrade."
 #endif
 #endif