diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4633cd69..4bca8b73 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,6 +34,9 @@ endif()
 
 if(PROJECT_IS_MINGW)
   add_definitions(-DPROJECT_IS_MINGW)
+  if(PROJECT_IS_MINGW_UNIX)
+    add_definitions(-DPROJECT_IS_MINGW_UNIX)
+  endif()
 endif()
 
 if(PROJECT_REQUIRE_ALPINE)