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-rw-r--r--src/crypto/hmac_drbg.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/crypto/hmac_drbg.c b/src/crypto/hmac_drbg.c
index 64613d01..efbd67dc 100644
--- a/src/crypto/hmac_drbg.c
+++ b/src/crypto/hmac_drbg.c
@@ -36,6 +36,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
*/
#include <stdint.h>
+#include <string.h>
#include <errno.h>
#include <ipxe/crypto.h>
#include <ipxe/hmac.h>