diff --git a/crypto/hmac_drbg.c b/crypto/hmac_drbg.c
index c8772ead2..fa4569f49 100644
--- a/crypto/hmac_drbg.c
+++ b/crypto/hmac_drbg.c
@@ -20,8 +20,8 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include <string.h>
 #include "hmac_drbg.h"
+#include <string.h>
 #include "memzero.h"
 #include "sha2.h"
 
@@ -83,7 +83,9 @@ static void update_v(HMAC_DRBG_CTX *ctx) {
   sha256_Transform(ctx->odig, ctx->v, ctx->v);
 }
 
-void hmac_drbg_init(HMAC_DRBG_CTX *ctx, const uint8_t *entropy, size_t entropy_len, const uint8_t *nonce, size_t nonce_len) {
+void hmac_drbg_init(HMAC_DRBG_CTX *ctx, const uint8_t *entropy,
+                    size_t entropy_len, const uint8_t *nonce,
+                    size_t nonce_len) {
   uint32_t h[SHA256_BLOCK_LENGTH / sizeof(uint32_t)];
 
   // Precompute the inner digest and outer digest of K = 0x00 ... 0x00.
@@ -103,7 +105,8 @@ void hmac_drbg_init(HMAC_DRBG_CTX *ctx, const uint8_t *entropy, size_t entropy_l
   memzero(h, sizeof(h));
 }
 
-void hmac_drbg_reseed(HMAC_DRBG_CTX *ctx, const uint8_t *entropy, size_t len, const uint8_t *addin, size_t addin_len) {
+void hmac_drbg_reseed(HMAC_DRBG_CTX *ctx, const uint8_t *entropy, size_t len,
+                      const uint8_t *addin, size_t addin_len) {
   update_k(ctx, 0, entropy, len, addin, addin_len);
   update_v(ctx);
   if (len == 0) return;
diff --git a/crypto/hmac_drbg.h b/crypto/hmac_drbg.h
index 32d3d6fdc..4b969dedb 100644
--- a/crypto/hmac_drbg.h
+++ b/crypto/hmac_drbg.h
@@ -34,8 +34,10 @@ typedef struct _HMAC_DRBG_CTX {
   uint32_t v[SHA256_BLOCK_LENGTH / sizeof(uint32_t)];
 } HMAC_DRBG_CTX;
 
-void hmac_drbg_init(HMAC_DRBG_CTX *ctx, const uint8_t *buf, size_t len, const uint8_t *nonce, size_t nonce_len);
-void hmac_drbg_reseed(HMAC_DRBG_CTX *ctx, const uint8_t *buf, size_t len, const uint8_t *addin, size_t addin_len);
+void hmac_drbg_init(HMAC_DRBG_CTX *ctx, const uint8_t *buf, size_t len,
+                    const uint8_t *nonce, size_t nonce_len);
+void hmac_drbg_reseed(HMAC_DRBG_CTX *ctx, const uint8_t *buf, size_t len,
+                      const uint8_t *addin, size_t addin_len);
 void hmac_drbg_generate(HMAC_DRBG_CTX *ctx, uint8_t *buf, size_t len);
 
 #endif
diff --git a/crypto/tests/test_check.c b/crypto/tests/test_check.c
index 2080520b7..ff4256239 100644
--- a/crypto/tests/test_check.c
+++ b/crypto/tests/test_check.c
@@ -4641,13 +4641,15 @@ START_TEST(test_hmac_drbg) {
   uint8_t nonce_bytes[16];
   memcpy(nonce_bytes, fromhex(nonce), sizeof(nonce_bytes));
   HMAC_DRBG_CTX ctx;
-  hmac_drbg_init(&ctx, fromhex(entropy), strlen(entropy) / 2, nonce_bytes, strlen(nonce) / 2);
+  hmac_drbg_init(&ctx, fromhex(entropy), strlen(entropy) / 2, nonce_bytes,
+                 strlen(nonce) / 2);
   hmac_drbg_reseed(&ctx, fromhex(reseed), strlen(reseed) / 2, NULL, 0);
   hmac_drbg_generate(&ctx, result, sizeof(result));
   hmac_drbg_generate(&ctx, result, sizeof(result));
   ck_assert_mem_eq(result, fromhex(expected), sizeof(result));
 
-  hmac_drbg_init(&ctx, fromhex(entropy), strlen(entropy) / 2, nonce_bytes, strlen(nonce) / 2);
+  hmac_drbg_init(&ctx, fromhex(entropy), strlen(entropy) / 2, nonce_bytes,
+                 strlen(nonce) / 2);
   hmac_drbg_reseed(&ctx, fromhex(reseed), strlen(reseed) / 2, NULL, 0);
   hmac_drbg_generate(&ctx, result, sizeof(result) - 13);
   hmac_drbg_generate(&ctx, result, sizeof(result) - 17);