diff --git a/gcc/value-range.h b/gcc/value-range.h
index f1c638f8cd0..934eec9e386 100644
--- a/gcc/value-range.h
+++ b/gcc/value-range.h
@@ -741,7 +741,7 @@ private:
 
   vrange *m_vrange;
   // The buffer must be at least the size of the largest range.
-  static_assert (sizeof (int_range_max) > sizeof (frange));
+  static_assert (sizeof (int_range_max) > sizeof (frange), "");
   char m_buffer[sizeof (int_range_max)];
 };