diff --git a/gcc/wide-int.cc b/gcc/wide-int.cc
index 24bdce2..ab92ee6 100644
--- a/gcc/wide-int.cc
+++ b/gcc/wide-int.cc
@@ -786,7 +786,7 @@ wi::bitreverse_large (HOST_WIDE_INT *val, const HOST_WIDE_INT *xval,
 	  unsigned int d = (precision - 1) - s;
 	  block = d / HOST_BITS_PER_WIDE_INT;
 	  offset = d & (HOST_BITS_PER_WIDE_INT - 1);
-          val[block] |= 1 << offset;
+          val[block] |= HOST_WIDE_INT_1U << offset;
 	}
     }