diff --git a/src/Main/MainCmd.cpp b/src/Main/MainCmd.cpp
index 4a11233ab5..fa230acacc 100644
--- a/src/Main/MainCmd.cpp
+++ b/src/Main/MainCmd.cpp
@@ -72,6 +72,13 @@ int main( int argc, char ** argv )
     setlocale(LC_ALL, "");
     setlocale(LC_NUMERIC, "C");
 
+#if defined(__MINGW32__)
+    const char* mingw_prefix = getenv("MINGW_PREFIX");
+    const char* py_home = getenv("PYTHONHOME");
+    if (!py_home && mingw_prefix)
+        _putenv_s("PYTHONHOME", mingw_prefix);
+#endif
+
     // Name and Version of the Application
     App::Application::Config()["ExeName"] = "FreeCAD";
     App::Application::Config()["ExeVendor"] = "FreeCAD";
diff --git a/src/Main/MainGui.cpp b/src/Main/MainGui.cpp
index 93c263d85e..af31924450 100644
--- a/src/Main/MainGui.cpp
+++ b/src/Main/MainGui.cpp
@@ -127,6 +127,11 @@ int main( int argc, char ** argv )
 #elif defined(FC_OS_MACOSX)
     (void)QLocale::system();
     putenv("PYTHONPATH=");
+#elif defined(__MINGW32__)
+    const char* mingw_prefix = getenv("MINGW_PREFIX");
+    const char* py_home = getenv("PYTHONHOME");
+    if (!py_home && mingw_prefix)
+        _putenv_s("PYTHONHOME", mingw_prefix);
 #else
     _putenv("PYTHONPATH=");
     // https://forum.freecadweb.org/viewtopic.php?f=4&t=18288