diff --git a/tests/impulse-tests/Make.gcc b/tests/impulse-tests/Make.gcc
index d358623281..535de601f2 100644
--- a/tests/impulse-tests/Make.gcc
+++ b/tests/impulse-tests/Make.gcc
@@ -173,7 +173,10 @@ ir/c1/double/dlt256/osc_enable.c : dsp/osc_enable.dsp
 	$(FAUST) -lang $(lang) -double -os -i -A ../../architecture -a archs/$(arch) $< -o $@
 
 ir/$(outdir)/prefix.ir:
-        echo "todo fix bug #1071 to test dsp/prefix.dsp"
+	echo "todo fix bug #1071 to test dsp/prefix.dsp"
+
+ir/cpp/double/mapp/constant.ir:
+	echo "todo fix bug #1074 to test dsp/constant.dsp"
 
 ir/$(outdir)/%.$(ext) : dsp/%.dsp
 	$(FAUST) -lang $(lang) $(FAUSTOPTIONS) -i -A ../../architecture -a archs/$(arch) $< -o $@