diff --git a/bd/lfs3_filebd.c b/bd/lfs3_filebd.c
index 5caefbd0..26a620d8 100644
--- a/bd/lfs3_filebd.c
+++ b/bd/lfs3_filebd.c
@@ -135,6 +135,7 @@ int lfs3_filebd_erase(const struct lfs3_cfg *cfg, lfs3_block_t block) {
     LFS3_ASSERT(block < cfg->block_count);
 
     // erase is a noop
+    (void)cfg;
     (void)block;
 
     LFS3_FILEBD_TRACE("lfs3_filebd_erase -> %d", 0);
diff --git a/bd/lfs3_rambd.c b/bd/lfs3_rambd.c
index 2df32ebf..ebccb9be 100644
--- a/bd/lfs3_rambd.c
+++ b/bd/lfs3_rambd.c
@@ -114,6 +114,7 @@ int lfs3_rambd_erase(const struct lfs3_cfg *cfg, lfs3_block_t block) {
     LFS3_ASSERT(block < cfg->block_count);
 
     // erase is a noop
+    (void)cfg;
     (void)block;
 
     LFS3_RAMBD_TRACE("lfs3_rambd_erase -> %d", 0);