diff --git a/toolchain/mingw-toolchain.xml b/toolchain/mingw-toolchain.xml
index cf4ce7d02..a47540907 100644
--- a/toolchain/mingw-toolchain.xml
+++ b/toolchain/mingw-toolchain.xml
@@ -42,7 +42,6 @@
   <flag value="-DHXCPP_BIG_ENDIAN" if="HXCPP_BIG_ENDIAN"/>
   <cppflag value="-std=c++11" if="HXCPP_CPP11" />
   <cppflag value="-std=c++17" if="HXCPP_CPP17" />
-  <cppflag value="-U__STRICT_ANSI__" />
   <flag value="-m32" unless="HXCPP_M64"/>
   <flag value="-m64" if="HXCPP_M64"/>
   <flag value="-DHXCPP_M64" if="HXCPP_M64"/>