diff --git a/lfs.c b/lfs.c
index 5fcfb04f..42a7a6bd 100644
--- a/lfs.c
+++ b/lfs.c
@@ -15231,8 +15231,8 @@ static int lfs_init(lfs_t *lfs, const struct lfs_config *cfg) {
     LFS_ASSERT(lfs->cfg->inline_size <= lfs->cfg->block_size/4);
     // shrub_size must be <= block_size/4
     LFS_ASSERT(lfs->cfg->shrub_size <= lfs->cfg->block_size/4);
-    // fragment_size must be <= block_size/8
-    LFS_ASSERT(lfs->cfg->fragment_size <= lfs->cfg->block_size/8);
+    // fragment_size must be <= block_size/4
+    LFS_ASSERT(lfs->cfg->fragment_size <= lfs->cfg->block_size/4);
 
     // setup read cache
     lfs->rcache.block = 0;
diff --git a/lfs.h b/lfs.h
index 6d51b3e6..4a4b2cca 100644
--- a/lfs.h
+++ b/lfs.h
@@ -286,7 +286,7 @@ struct lfs_config {
 
     // Maximum size of a non-block B-tree leaf in bytes. Smaller values may
     // make small random-writes cheaper, but increase metadata overhead. Must
-    // be <= block_size/8.
+    // be <= block_size/4.
     lfs_size_t fragment_size;
 
     // Threshold for compacting multiple fragments into a block. Smaller