diff --git a/Installation/install_cgal b/Installation/install_cgal
index 0a6cfa9e19b..1a02638a407 100755
--- a/Installation/install_cgal
+++ b/Installation/install_cgal
@@ -1083,6 +1083,11 @@ set_compiler_flags()
 		*) ADDITIONAL_CXXFLAGS="${ADDITIONAL_CXXFLAGS} -frounding-math";;
 		   # g++-4.x and after: we need -frounding-math to avoid FPU rounding mode optimisations
 	    esac
+	    case `compiler_version` in
+                # adjust to future versions. flag will be removed some day, anyhow
+                4.[12345].*)
+                   ADDITIONAL_CXXFLAGS="${ADDITIONAL_CXXFLAGS} -ffriend-injection";;
+            esac
 	    ;;
     esac
 }