diff --git a/CMakeLists.txt b/CMakeLists.txt
index e692027173..1b7a5779eb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -809,7 +809,7 @@ if(MSVC)
 else()
   set(ZIG_WASM2C_COMPILE_FLAGS "-std=c99 -O2")
   set(ZIG1_COMPILE_FLAGS "-std=c99 -Os")
-  set(ZIG2_COMPILE_FLAGS "-std=c99 -O0 -fno-stack-protector")
+  set(ZIG2_COMPILE_FLAGS "-std=c99 -O0 -fno-sanitize=undefined -fno-stack-protector")
   if(APPLE)
     set(ZIG2_LINK_FLAGS "-Wl,-stack_size,0x10000000")
   elseif(MINGW)