diff --git a/src/os.cpp b/src/os.cpp
index 5f115c859a..c91fa4f08e 100644
--- a/src/os.cpp
+++ b/src/os.cpp
@@ -643,11 +643,13 @@ int os_get_cwd(Buf *out_cwd) {
 #define is_wprefix(s, prefix) \
     (wcsncmp((s), (prefix), sizeof(prefix) / sizeof(WCHAR) - 1) == 0)
 static bool is_stderr_cyg_pty(void) {
+#if defined(__MINGW32__)
+    return false;
+#else
     HANDLE stderr_handle = GetStdHandle(STD_ERROR_HANDLE);
     if (stderr_handle == INVALID_HANDLE_VALUE)
         return false;
 
-    HANDLE h;
     int size = sizeof(FILE_NAME_INFO) + sizeof(WCHAR) * MAX_PATH;
     FILE_NAME_INFO *nameinfo;
     WCHAR *p = NULL;
@@ -695,6 +697,7 @@ static bool is_stderr_cyg_pty(void) {
     }
     free(nameinfo);
     return (p != NULL);
+#endif
 }
 #endif