diff --git a/ghc/tests/deSugar/should_compile/Makefile b/ghc/tests/deSugar/should_compile/Makefile
index baa35fb42b67d622e1e539ada28240a00f4bd5e8..08a1c3e32bc47c110148440202ff56ad0420f9a5 100644
--- a/ghc/tests/deSugar/should_compile/Makefile
+++ b/ghc/tests/deSugar/should_compile/Makefile
@@ -6,6 +6,7 @@ SRC_HC_OPTS += -dcore-lint
 
 ds035_HC_OPTS = -fglasgow-exts
 ds044_HC_OPTS = -O -funbox-strict-fields
+ds049_HC_OPTS = -fvia-C
 ds050_HC_OPTS = -fglasgow-exts
 
 # mkdependHS doesn't understand OPTIONS pragmas...