diff --git a/.CMake/gcc_clang_intrinsics.cmake b/.CMake/gcc_clang_intrinsics.cmake
index 4bbb4aaa5..fd45d753e 100644
--- a/.CMake/gcc_clang_intrinsics.cmake
+++ b/.CMake/gcc_clang_intrinsics.cmake
@@ -9,7 +9,11 @@ if(NOT COMPILE_RESULT)
      message(FATAL_ERROR "Could not compile .CMake/detect_gcc_clang_intrinsics.c" ${COMPILE_OUTPUT})
 endif()
 if(NOT RUN_RESULT EQUAL 0)
-     message(FATAL_ERROR ".CMake/detect_gcc_clang_intrinsics.c returned exit code: " ${RUN_RESULT})
+	if(CMAKE_CROSSCOMPILING)
+		message(STATUS "Detecting language features in cross-compiling mode impossible. Setting all CPU features OFF.")
+	else()
+     		message(FATAL_ERROR ".CMake/detect_gcc_clang_intrinsics.c returned exit code: " ${RUN_RESULT})
+     	endif()
 endif()
 foreach(CPU_EXTENSION ${RUN_OUTPUT})
      if (NOT DEFINED OQS_USE_${CPU_EXTENSION}_INSTRUCTIONS)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 08cf4a363..e76fcbe12 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,13 @@ endif()
 if(POLICY CMP0063)
     cmake_policy(SET CMP0063 NEW)
 endif()
+if(POLICY CMP0066)
+    cmake_policy(SET CMP0066 NEW)
+endif()
+if(POLICY CMP0067)
+    cmake_policy(SET CMP0067 NEW)
+endif()
+
 
 project(liboqs C ASM)