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-rw-r--r--www/mod_perl2/Makefile4
1 files changed, 2 insertions, 2 deletions
diff --git a/www/mod_perl2/Makefile b/www/mod_perl2/Makefile
index 6367fbac02d1..dbbe1f2b882b 100644
--- a/www/mod_perl2/Makefile
+++ b/www/mod_perl2/Makefile
@@ -62,9 +62,9 @@ MAN3= APR.3 APR::Base64.3 APR::Brigade.3 APR::Bucket.3 \
.include <bsd.port.pre.mk>
.if ${APACHE_VERSION} >= 21
-PLIST_SUB= THREADMUTEX=""
+PLIST_SUB+= THREADMUTEX=""
.else
-PLIST_SUB= THREADMUTEX="@comment "
+PLIST_SUB+= THREADMUTEX="@comment "
.endif
pre-configure: