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-rw-r--r--Mk/bsd.autotools.mk2
1 files changed, 1 insertions, 1 deletions
diff --git a/Mk/bsd.autotools.mk b/Mk/bsd.autotools.mk
index b92fcc7bbe7a..265daa371a78 100644
--- a/Mk/bsd.autotools.mk
+++ b/Mk/bsd.autotools.mk
@@ -74,7 +74,7 @@ USE_AUTOTOOLS_COMPAT+= libtool:${WANT_LIBTOOL_VER}:env
# Ensure that we're not mixing and matching old and new systems
#
-.if defined(USE_AUTOTOOLS_COMPAT)
+.if ${USE_AUTOTOOLS_COMPAT}!=""
. if defined(USE_AUTOTOOLS)
BROKEN+= "Mix and match of old and new autotools system prohibited"
. else