diff --git a/cmake/toolchain-mingw.cmake b/cmake/toolchain-mingw.cmake
index 013dbeb5..2e0bc669 100644
--- a/cmake/toolchain-mingw.cmake
+++ b/cmake/toolchain-mingw.cmake
@@ -8,3 +8,5 @@ set(CMAKE_C_COMPILER  x86_64-w64-mingw32-gcc)
 set(CMAKE_RC_COMPILER x86_64-w64-mingw32-windres)
 set(CMAKE_AR          x86_64-w64-mingw32-ar)
 set(CMAKE_RANLIB      x86_64-w64-mingw32-ranlib)
+
+add_compile_definitions(__USE_MINGW_ANSI_STDIO)