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-rw-r--r--crypto/md2/md2.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/crypto/md2/md2.h b/crypto/md2/md2.h
index 5b71855cb2..a46120e7d4 100644
--- a/crypto/md2/md2.h
+++ b/crypto/md2/md2.h
@@ -63,6 +63,7 @@
#ifdef OPENSSL_NO_MD2
#error MD2 is disabled.
#endif
+#include <stddef.h>
#define MD2_DIGEST_LENGTH 16
#define MD2_BLOCK 16