diff --git a/cpp/src/parquet/types.h b/cpp/src/parquet/types.h
index f3d3abfc918..4529dbe6133 100644
--- a/cpp/src/parquet/types.h
+++ b/cpp/src/parquet/types.h
@@ -29,6 +29,15 @@
 #include "parquet/platform.h"
 #include "parquet/type_fwd.h"
 
+#ifdef _WIN32
+
+// Repetition::OPTIONAL conflicts with a #define, so we undefine it
+#ifdef OPTIONAL
+#undef OPTIONAL
+#endif
+
+#endif  // _WIN32
+
 namespace arrow {
 namespace util {