diff --git a/compiler-rt/lib/asan/CMakeLists.txt b/compiler-rt/lib/asan/CMakeLists.txt
index 8f329531d596ebd9e1ebc5ece21874fb15797664..63632467684ab9ef4dce345affc1e1e14a4b0cd0 100644
--- a/compiler-rt/lib/asan/CMakeLists.txt
+++ b/compiler-rt/lib/asan/CMakeLists.txt
@@ -50,9 +50,11 @@ endif()
 filter_available_targets(ASAN_SUPPORTED_ARCH
   x86_64 i386 powerpc64)
 
-set(ASAN_ASM_SOURCES asan_asm_instrumentation.S)
-set_source_files_properties(${ASAN_ASM_SOURCES} PROPERTIES LANGUAGE C)
-list(APPEND ASAN_SOURCES ${ASAN_ASM_SOURCES})
+if (NOT MSVC)
+  set(ASAN_ASM_SOURCES asan_asm_instrumentation.S)
+  set_source_files_properties(${ASAN_ASM_SOURCES} PROPERTIES LANGUAGE C)
+  list(APPEND ASAN_SOURCES ${ASAN_ASM_SOURCES})
+endif()
 
 # Compile ASan sources into an object library.
 if(APPLE)