diff --git a/sys/hashes/sha224.c b/sys/hashes/sha224.c
index 0fdcf8c484..60429a6cce 100644
--- a/sys/hashes/sha224.c
+++ b/sys/hashes/sha224.c
@@ -41,21 +41,6 @@ void sha224_init(sha224_context_t *ctx)
     ctx->state[7] = 0xBEFA4FA4;
 }
 
-/* Add bytes into the hash */
-void sha224_update(sha224_context_t *ctx, const void *data, size_t len)
-{
-    sha2xx_update(ctx, data, len);
-}
-
-/*
- * SHA-224 finalization.  Pads the input data, exports the hash value,
- * and clears the context state.
- */
-void sha224_final(sha224_context_t *ctx, void *dst)
-{
-    sha2xx_final(ctx, dst, SHA224_DIGEST_LENGTH);
-}
-
 void *sha224(const void *data, size_t len, void *digest)
 {
     sha224_context_t c;
diff --git a/sys/hashes/sha256.c b/sys/hashes/sha256.c
index ac8e37c8a2..4109911bfe 100644
--- a/sys/hashes/sha256.c
+++ b/sys/hashes/sha256.c
@@ -69,21 +69,6 @@ void sha256_init(sha256_context_t *ctx)
     ctx->state[7] = 0x5BE0CD19;
 }
 
-/* Add bytes into the hash */
-void sha256_update(sha256_context_t *ctx, const void *data, size_t len)
-{
-    sha2xx_update(ctx, data, len);
-}
-
-/*
- * SHA-256 finalization.  Pads the input data, exports the hash value,
- * and clears the context state.
- */
-void sha256_final(sha256_context_t *ctx, void *dst)
-{
-    sha2xx_final(ctx, dst, SHA256_DIGEST_LENGTH);
-}
-
 void *sha256(const void *data, size_t len, void *digest)
 {
     sha256_context_t c;
diff --git a/sys/include/hashes/sha224.h b/sys/include/hashes/sha224.h
index f6794384e4..13d2692b40 100644
--- a/sys/include/hashes/sha224.h
+++ b/sys/include/hashes/sha224.h
@@ -88,7 +88,10 @@ void sha224_init(sha224_context_t *ctx);
  * @param[in] data Input data
  * @param[in] len  Length of @p data
  */
-void sha224_update(sha224_context_t *ctx, const void *data, size_t len);
+static inline void sha224_update(sha224_context_t *ctx, const void *data, size_t len)
+{
+    sha2xx_update(ctx, data, len);
+}
 
 /**
  * @brief SHA-224 finalization.  Pads the input data, exports the hash value,
@@ -97,7 +100,10 @@ void sha224_update(sha224_context_t *ctx, const void *data, size_t len);
  * @param ctx    sha224_context_t handle to use
  * @param digest resulting digest, this is the hash of all the bytes
  */
-void sha224_final(sha224_context_t *ctx, void *digest);
+static inline void sha224_final(sha224_context_t *ctx, void *digest)
+{
+    sha2xx_final(ctx, digest, SHA224_DIGEST_LENGTH);
+}
 
 /**
  * @brief A wrapper function to simplify the generation of a hash, this is
diff --git a/sys/include/hashes/sha256.h b/sys/include/hashes/sha256.h
index 4559871330..800fb8b0ce 100644
--- a/sys/include/hashes/sha256.h
+++ b/sys/include/hashes/sha256.h
@@ -106,7 +106,10 @@ void sha256_init(sha256_context_t *ctx);
  * @param[in] data Input data
  * @param[in] len  Length of @p data
  */
-void sha256_update(sha256_context_t *ctx, const void *data, size_t len);
+static inline void sha256_update(sha256_context_t *ctx, const void *data, size_t len)
+{
+    sha2xx_update(ctx, data, len);
+}
 
 /**
  * @brief SHA-256 finalization.  Pads the input data, exports the hash value,
@@ -115,7 +118,10 @@ void sha256_update(sha256_context_t *ctx, const void *data, size_t len);
  * @param ctx    sha256_context_t handle to use
  * @param digest resulting digest, this is the hash of all the bytes
  */
-void sha256_final(sha256_context_t *ctx, void *digest);
+static inline void sha256_final(sha256_context_t *ctx, void *digest)
+{
+    sha2xx_final(ctx, digest, SHA256_DIGEST_LENGTH);
+}
 
 /**
  * @brief A wrapper function to simplify the generation of a hash, this is