diff --git a/Installation/lib/cmake/CGAL/CGALConfig.cmake b/Installation/lib/cmake/CGAL/CGALConfig.cmake
index 2d3f7790135..8e2894ac205 100644
--- a/Installation/lib/cmake/CGAL/CGALConfig.cmake
+++ b/Installation/lib/cmake/CGAL/CGALConfig.cmake
@@ -166,4 +166,9 @@ cgal_parse_version_h( "${CGAL_INSTALLATION_PACKAGE_DIR}/include/CGAL/version.h"
   "CGAL_BUILD_VERSION")
 set(CGAL_VERSION "${CGAL_MAJOR_VERSION}.${CGAL_MINOR_VERSION}.${CGAL_BUGFIX_VERSION}.${CGAL_BUILD_VERSION}")
 
+if( CGAL_DEV_MODE OR RUNNING_CGAL_AUTO_TEST )
+  # Do not use -isystem for CGAL include paths
+  set(CMAKE_NO_SYSTEM_FROM_IMPORTED TRUE)
+endif()
+
 include("${CGAL_MODULES_DIR}/CGAL_enable_end_of_configuration_hook.cmake")