diff --git a/src/libcrypto.c b/src/libcrypto.c
index 588c4493..9c482aa0 100644
--- a/src/libcrypto.c
+++ b/src/libcrypto.c
@@ -705,6 +705,7 @@ evp_cipher_aead_get_length(struct ssh_cipher_struct *cipher,
                            size_t len,
                            uint64_t seq)
 {
+    (void)cipher;
     (void)seq;
 
     /* The length is not encrypted: Copy it to the result buffer */
diff --git a/src/libgcrypt.c b/src/libgcrypt.c
index 2b4e3371..3201434b 100644
--- a/src/libgcrypt.c
+++ b/src/libgcrypt.c
@@ -422,6 +422,7 @@ aes_aead_get_length(struct ssh_cipher_struct *cipher,
                     size_t len,
                     uint64_t seq)
 {
+    (void)cipher;
     (void)seq;
 
     /* The length is not encrypted: Copy it to the result buffer */
diff --git a/src/libmbedcrypto.c b/src/libmbedcrypto.c
index 8c0f5b4c..d8799eef 100644
--- a/src/libmbedcrypto.c
+++ b/src/libmbedcrypto.c
@@ -853,6 +853,7 @@ cipher_gcm_get_length(struct ssh_cipher_struct *cipher,
                       size_t len,
                       uint64_t seq)
 {
+    (void)cipher;
     (void)seq;
 
     /* The length is not encrypted: Copy it to the result buffer */