diff --git a/CMakeLists.txt b/CMakeLists.txt
index 977b31c..ce9cbc7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -108,6 +108,10 @@ endif()
 add_library(snmalloc_lib INTERFACE)
 target_include_directories(snmalloc_lib INTERFACE src/)
 
+if(SNMALLOC_USE_CXX17)
+  target_compile_definitions(snmalloc_lib INTERFACE -DSNMALLOC_USE_CXX17)
+endif()
+
 if(NOT MSVC)
   find_package(Threads REQUIRED COMPONENTS snmalloc_lib)
   target_link_libraries(snmalloc_lib INTERFACE ${CMAKE_THREAD_LIBS_INIT})
diff --git a/src/ds/defines.h b/src/ds/defines.h
index b001982..d8c4955 100644
--- a/src/ds/defines.h
+++ b/src/ds/defines.h
@@ -7,7 +7,7 @@
 #  define unlikely(x) !!(x)
 #  define SNMALLOC_SLOW_PATH NOINLINE
 #  define SNMALLOC_FAST_PATH ALWAYSINLINE
-#  if _MSC_VER >= 1927
+#  if _MSC_VER >= 1927 && !defined(SNMALLOC_USE_CXX17)
 #    define SNMALLOC_FAST_PATH_LAMBDA [[msvc::forceinline]]
 #  else
 #    define SNMALLOC_FAST_PATH_LAMBDA