diff --git a/gcc/testsuite/gcc.dg/tree-ssa/forwprop-36.c b/gcc/testsuite/gcc.dg/tree-ssa/forwprop-36.c
index 9de73ff947f..f3871bf45e8 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/forwprop-36.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/forwprop-36.c
@@ -21,4 +21,5 @@ main ()
   return 0;
 }
 
-/* { dg-final { scan-tree-dump "if \\(b.0_\[0-9\]+ != 0\\)" "cddce1" } } */
+/* { dg-final { scan-tree-dump "if \\(b.0_\[0-9\]+ != 0\\)" "cddce1" { target { ! mmix-knuth-mmixware } } } } */
+/* { dg-final { scan-tree-dump "if \\(b::1_\[0-9\]+ != 0\\)" "cddce1" { target { mmix-knuth-mmixware } } } } */