diff --git a/skeletons/tests/Makefile.in b/skeletons/tests/Makefile.in
index 43d577f..a4f8658 100644
--- a/skeletons/tests/Makefile.in
+++ b/skeletons/tests/Makefile.in
@@ -128,6 +128,7 @@
 red=; grn=; lgn=; blu=; std=
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = @ACLOCAL@
+ADD_CFLAGS = @ADD_CFLAGS@
 AMTAR = @AMTAR@
 AR = @AR@
 AUTOCONF = @AUTOCONF@