diff --git a/Installation/cmake/modules/CGAL_SetupCGAL_CoreDependencies.cmake b/Installation/cmake/modules/CGAL_SetupCGAL_CoreDependencies.cmake
index 816ae656fb4..94d2d839375 100644
--- a/Installation/cmake/modules/CGAL_SetupCGAL_CoreDependencies.cmake
+++ b/Installation/cmake/modules/CGAL_SetupCGAL_CoreDependencies.cmake
@@ -49,7 +49,7 @@ set_property(GLOBAL PROPERTY CGAL_Core_FOUND TRUE)
 
 function(CGAL_setup_CGAL_Core_dependencies target)
   find_package( Boost 1.72 REQUIRED )
-  if (!CGAL_DISABLE_GMP AND GMP_FOUND)
+  if (NOT CGAL_DISABLE_GMP AND GMP_FOUND)
     use_CGAL_GMP_support(CGAL_Core INTERFACE)
   endif()
   target_compile_definitions(${target} INTERFACE CGAL_USE_CORE=1)
diff --git a/Shape_detection/test/Shape_detection/CMakeLists.txt b/Shape_detection/test/Shape_detection/CMakeLists.txt
index 503af515ccf..85d23cf07d2 100644
--- a/Shape_detection/test/Shape_detection/CMakeLists.txt
+++ b/Shape_detection/test/Shape_detection/CMakeLists.txt
@@ -51,7 +51,7 @@ if(TARGET CGAL::Eigen3_support)
   set(RANSAC_PROTO_DIR CACHE PATH "")
 
   add_executable(test_validity_sampled_data "test_validity_sampled_data.cpp")
-  target_link_libraries(test_validity_sampled_data CGAL::CGAL CGAL::Data CGAL::Eigen3_support)
+  target_link_libraries(test_validity_sampled_data PRIVATE CGAL::CGAL CGAL::Data CGAL::Eigen3_support)
   cgal_add_test(test_validity_sampled_data)
 else()
   message(STATUS "NOTICE: Some tests require Eigen 3.1 (or greater), and will not be compiled.")