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-rw-r--r--math/ntl/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/math/ntl/Makefile b/math/ntl/Makefile
index 0ef769ba7b99..cb35cbfc0248 100644
--- a/math/ntl/Makefile
+++ b/math/ntl/Makefile
@@ -12,7 +12,7 @@ COMMENT= Victor Shoup's Number Theory Library
LICENSE= LGPL21+
LICENSE_FILE= ${WRKSRC}/../doc/copying.txt
-USES= perl5 libtool
+USES= compiler:c11 libtool perl5
USE_LDCONFIG= yes
USE_PERL5= build
HAS_CONFIGURE= yes