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-rw-r--r--eclass/autotools.eclass1
1 files changed, 1 insertions, 0 deletions
diff --git a/eclass/autotools.eclass b/eclass/autotools.eclass
index 4ae360aa24d4..e51e02f4b439 100644
--- a/eclass/autotools.eclass
+++ b/eclass/autotools.eclass
@@ -159,6 +159,7 @@ unset _automake_atom _autoconf_atom
# particular options
# @ECLASS-VARIABLE: AT_M4DIR
+# @DEFAULT_UNSET
# @DESCRIPTION:
# Additional director(y|ies) aclocal should search
: ${AT_M4DIR:=}