diff --git a/CPP/CMakeLists.txt b/CPP/CMakeLists.txt
index 20e96522..e89ce45f 100644
--- a/CPP/CMakeLists.txt
+++ b/CPP/CMakeLists.txt
@@ -72,7 +72,7 @@ if (NOT (CLIPPER2_USINGZ STREQUAL "ONLY"))
   if (MSVC)
     target_compile_options(Clipper2 PRIVATE /W4 /WX)
   else()
-    target_compile_options(Clipper2 PRIVATE -Wall -Wextra -Wpedantic -Werror)
+    target_compile_options(Clipper2 PRIVATE -Wall -Wextra -Wpedantic -Werror -Wno-c++20-compat)
     target_link_libraries(Clipper2 PUBLIC -lm)
   endif()
 endif()
@@ -96,7 +96,7 @@ if (NOT (CLIPPER2_USINGZ STREQUAL "OFF"))
   if (MSVC)
     target_compile_options(Clipper2Z PRIVATE /W4 /WX)
   else()
-    target_compile_options(Clipper2Z PRIVATE -Wall -Wextra -Wpedantic -Werror)
+    target_compile_options(Clipper2Z PRIVATE -Wall -Wextra -Wpedantic -Werror -Wno-c++20-compat)
     target_link_libraries(Clipper2Z PUBLIC -lm)
   endif()
 endif()