diff --git a/src/cg3/Makefile.am b/src/cg3/Makefile.am
index c7ca07c4..54497364 100644
--- a/src/cg3/Makefile.am
+++ b/src/cg3/Makefile.am
@@ -29,7 +29,7 @@ dependency.cg3: $(gt_SHARED_smi)/src/cg3/dependency.cg3
 	$(AM_V_CP)cp -f $< $@
 else
 %.cg3:
-	$(AM_V_GEN)echo "! missing dependency $@" > $@
+	$(AM_V_GEN)echo "# missing dependency $@" > $@
 endif
 
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