Index: lib/Fuzzer/test/CMakeLists.txt
===================================================================
--- lib/Fuzzer/test/CMakeLists.txt
+++ lib/Fuzzer/test/CMakeLists.txt
@@ -28,6 +28,9 @@
 set(CMAKE_CXX_FLAGS "${LIBFUZZER_FLAGS_BASE} -fsanitize-coverage=trace-pc-guard,indirect-calls,trace-cmp,trace-div,trace-gep -gline-tables-only")
 
 if(MSVC)
+  # Always use MD, since sanitizer coverage is currently not supported for MT.
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MD")
+
   # In order to use the sanitizers in Windows, we need to link against many
   # runtime libraries which will depend on the target being created
   # (executable or dll) and the c runtime library used (MT/MD).