Index: src/private_typeinfo.cpp
===================================================================
--- src/private_typeinfo.cpp
+++ src/private_typeinfo.cpp
@@ -51,13 +51,17 @@
 // Defining _LIBCXX_DYNAMIC_FALLBACK does not help since can_catch() calls 
 // is_equal() with use_strcmp=false so the string names are not compared.
 
+#define _UNUSED_IN_WIN32
 #ifdef _WIN32
 #include <string.h>
+#define _UNUSED_IN_WIN32 __attribute__((unused))
 #endif
 
 static inline
 bool
-is_equal(const std::type_info* x, const std::type_info* y, bool use_strcmp)
+is_equal(const std::type_info* x,
+         const std::type_info* y,
+         _UNUSED_IN_WIN32 bool use_strcmp)
 {
 #ifndef _WIN32
     if (!use_strcmp)