diff --git a/cmake/BornAgain/Windows.cmake b/cmake/BornAgain/Windows.cmake
index ded906613f2e7f679c7845b4f1624e150c8aebfd..4d5a5d205059eef3b4e0bef6dadc35452fc07dc6 100644
--- a/cmake/BornAgain/Windows.cmake
+++ b/cmake/BornAgain/Windows.cmake
@@ -29,3 +29,4 @@ string(APPEND CMAKE_SHARED_LINKER_FLAGS_DEBUG
     " /NODEFAULTLIB:libcmt.lib")
 
 add_compile_options($<$<CONFIG:Debug>:/ZI>)
+add_compile_options("/wd4068") # don't warn about unknown pragmas