diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index d4dc5d7146a..76bc8ffaa68 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,8 @@
 2019-03-18  Jason Merrill  <jason@redhat.com>
 
+	PR c++/89630 - ICE with dependent using-decl as template arg.
+	* tree.c (cp_tree_equal): Always return false for USING_DECL.
+
 	PR c++/89761 - ICE with sizeof... in pack expansion.
 	* pt.c (argument_pack_element_is_expansion_p): Handle
 	ARGUMENT_PACK_SELECT.
diff --git a/gcc/cp/tree.c b/gcc/cp/tree.c
index af077e795cf..718eed349c6 100644
--- a/gcc/cp/tree.c
+++ b/gcc/cp/tree.c
@@ -3661,6 +3661,7 @@ cp_tree_equal (tree t1, tree t2)
     case TEMPLATE_DECL:
     case IDENTIFIER_NODE:
     case SSA_NAME:
+    case USING_DECL:
       return false;
 
     case BASELINK:
@@ -3787,14 +3788,6 @@ cp_tree_equal (tree t1, tree t2)
 				     DEFERRED_NOEXCEPT_ARGS (t2)));
       break;
 
-    case USING_DECL:
-      if (DECL_DEPENDENT_P (t1) && DECL_DEPENDENT_P (t2))
-	return (cp_tree_equal (USING_DECL_SCOPE (t1),
-			       USING_DECL_SCOPE (t2))
-		&& cp_tree_equal (DECL_NAME (t1),
-				  DECL_NAME (t2)));
-      return false;
-
     case LAMBDA_EXPR:
       /* Two lambda-expressions are never considered equivalent.  */
       return false;