diff --git a/crypto/sha2.c b/crypto/sha2.c
index 3096efe92..afbe0c3e3 100644
--- a/crypto/sha2.c
+++ b/crypto/sha2.c
@@ -274,7 +274,8 @@ static void sha2_finish(sha2_context * ctx, uint8_t digest[32])
 	PUT_UINT32_BE(ctx->state[4], digest, 16);
 	PUT_UINT32_BE(ctx->state[5], digest, 20);
 	PUT_UINT32_BE(ctx->state[6], digest, 24);
-	PUT_UINT32_BE(ctx->state[7], digest, 28);
+	if (!ctx->is224)
+		PUT_UINT32_BE(ctx->state[7], digest, 28);
 }
 
 struct sha2 {