diff --git a/CMakeLists.txt b/CMakeLists.txt
index 07c8e2f5b..2a89d1e13 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -77,6 +77,12 @@ else()
   endif()
 endif()
 
+# MinGW does not define WIN32/WINDOWS the way OpenFX HostSupport expects.
+# Ensure these are visible so ofxhBinary.h et al. pick the Windows code path.
+if(MINGW)
+  add_compile_definitions(WIN32 WINDOWS)
+endif()
+
 set(OLIVE_DEFINITIONS -DQT_DEPRECATED_WARNINGS)
 if (WIN32)
   list(APPEND OLIVE_DEFINITIONS -DUNICODE -D_UNICODE)
diff --git a/app/pluginSupport/image.h b/app/pluginSupport/image.h
index 44f21e97b..7ea5e6658 100644
--- a/app/pluginSupport/image.h
+++ b/app/pluginSupport/image.h
@@ -27,7 +27,6 @@
 #include "render/loopmode.h"
 #include "render/videoparams.h"
 #include <cstdint>
-#include <qtypes.h>
 #include <string>
 #include <vector>
 namespace olive