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-rw-r--r--configure.ac1
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 17c621c..8b4a9b2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -387,6 +387,7 @@ AC_CHECK_DECLS([snprintf, vsnprintf, vasprintf, asprintf, strndup])
AC_MSG_CHECKING([if mmap() supports MAP_FAILED])
AC_TRY_COMPILE([
+#include <stddef.h>
#ifdef HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif],[