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-rw-r--r--include/libipset/types.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/libipset/types.h b/include/libipset/types.h
index 45d5e3d..6a17750 100644
--- a/include/libipset/types.h
+++ b/include/libipset/types.h
@@ -7,6 +7,7 @@
#ifndef LIBIPSET_TYPES_H
#define LIBIPSET_TYPES_H
+#include <stddef.h> /* NULL */
#include <stdint.h> /* uintxx_t */
#include <libipset/data.h> /* enum ipset_opt */