diff --git a/crypto/fipsmodule/self_check/self_check.c b/crypto/fipsmodule/self_check/self_check.c
index 192a0079a..6d95193dd 100644
--- a/crypto/fipsmodule/self_check/self_check.c
+++ b/crypto/fipsmodule/self_check/self_check.c
@@ -21,6 +21,7 @@
 #include <openssl/aes.h>
 #include <openssl/bn.h>
 #include <openssl/des.h>
+#include <openssl/digest.h>
 #include <openssl/ec.h>
 #include <openssl/ecdsa.h>
 #include <openssl/ec_key.h>