diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 69c063654e4..9d5822a2bf4 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2001-02-11  Richard Henderson  <rth@redhat.com>
+
+	* tree.c (build1): Check for null operand in last change.
+
 2001-02-11  Richard Henderson  <rth@redhat.com>
 
 	* fold-const.c (split_tree): Don't assume a constant isn't splittable.
diff --git a/gcc/tree.c b/gcc/tree.c
index b45dc19a813..4ef1441041b 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -2482,7 +2482,7 @@ build1 (code, type, node)
       break;
 
     default:
-      if (TREE_CODE_CLASS (code) == '1' && TREE_CONSTANT (node))
+      if (TREE_CODE_CLASS (code) == '1' && node && TREE_CONSTANT (node))
 	TREE_CONSTANT (t) = 1;
       break;
     }