diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 290b89f5704..071ee8e8893 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-06-13  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR target/90871
+	* g++.dg/ext/altivec-15.C: Add dg-error directive.
+
 2019-06-13  Iain Sandoe  <iain@sandoe.co.uk>
 
 	* gcc.dg/pr90760.c: Require alias support.
diff --git a/gcc/testsuite/g++.dg/ext/altivec-15.C b/gcc/testsuite/g++.dg/ext/altivec-15.C
index d8e982db4ff..662d6789087 100644
--- a/gcc/testsuite/g++.dg/ext/altivec-15.C
+++ b/gcc/testsuite/g++.dg/ext/altivec-15.C
@@ -5,7 +5,7 @@
 /* This test was added for an internal compiler error.  The number and
    content of error messages is irrelevant.  */
 
-struct SubData
+struct SubData  // { dg-error "" }
 {
     inline const Float Clamp(Float f, Float f0, Float f1) // { dg-error "" }
     }