diff --git a/xmake.lua b/xmake.lua
index 7a7afe0..e4cc578 100644
--- a/xmake.lua
+++ b/xmake.lua
@@ -36,16 +36,15 @@ elseif is_plat("mingw") then
 	add_ldflags("-Wa,-mbig-obj")
 end
 
-if is_mode("debug") then
-	set_runtimes("MDd")
-elseif is_mode("asan", "tsan", "ubsan") then
+set_runtimes(is_mode("debug") and "MDd" or "MD")
+
+if is_mode("asan", "tsan", "ubsan") then
 	set_optimize("none") -- by default xmake will optimize asan builds
 elseif is_mode("coverage") then
 	if not is_plat("windows") then
 		add_links("gcov")
 	end
 elseif is_mode("releasedbg") then
-	set_runtimes("MD")
 	set_fpmodels("fast")
 	add_vectorexts("sse", "sse2", "sse3", "ssse3")
 end