diff --git a/CMakeLists.txt b/CMakeLists.txt
index 499ccff..6b3182b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,7 +54,9 @@
 endif(CMAKE_COMPILER_IS_CLANG)
 
 if(MSVC)
-    set(CMAKE_C_FLAGS_CHECK       "/WX")
+    # Strictest warnings, and treat as errors
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W3")
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /WX")
 endif(MSVC)
 
 if(CMAKE_BUILD_TYPE STREQUAL "Coverage")