diff --git a/test/Makefile b/test/Makefile
index 8694128f..4f6a3016 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -58,6 +58,7 @@ $(INITRAMFS)/lib/x86_64-linux-gnu: | $(VDSO_LIB)
 	@cp -L /lib/x86_64-linux-gnu/libkrb5support.so.0 $@
 	@cp -L /lib/x86_64-linux-gnu/libkeyutils.so.1 $@
 	@cp -L /lib/x86_64-linux-gnu/libresolv.so.2 $@
+	@# required for VDSO
 	@cp -L $(VDSO_LIB) $@
 
 $(VDSO_LIB): | $(VDSO_DIR)