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-rw-r--r--render/box.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/render/box.c b/render/box.c
index bf055eac4..4d57c9f8c 100644
--- a/render/box.c
+++ b/render/box.c
@@ -11,6 +11,7 @@
* Conversion of XML tree to box tree (implementation).
*/
+#define _GNU_SOURCE /* for strndup */
#include <assert.h>
#include <ctype.h>
#include <stdio.h>