diff --git a/src/hb-blob.cc b/src/hb-blob.cc
index 664ad782fbe8bbc24665772449b7b14545d331e5..b903acc12c2685a42efcf9e6ea4d9935b8c96f50 100644
--- a/src/hb-blob.cc
+++ b/src/hb-blob.cc
@@ -323,26 +323,6 @@ try_writable_inplace_locked (hb_blob_t *blob)
   }
 }
 
-hb_bool_t
-hb_blob_try_writable_inplace (hb_blob_t *blob)
-{
-  hb_memory_mode_t mode;
-
-  if (hb_object_is_inert (blob))
-    return FALSE;
-
-  hb_mutex_lock (&blob->lock);
-
-  if (blob->mode == HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE)
-    try_writable_inplace_locked (blob);
-
-  mode = blob->mode;
-
-  hb_mutex_unlock (&blob->lock);
-
-  return mode == HB_MEMORY_MODE_WRITABLE;
-}
-
 hb_bool_t
 hb_blob_try_writable (hb_blob_t *blob)
 {
diff --git a/src/hb-blob.h b/src/hb-blob.h
index 8bfbd48e5e6adcc39e28959b047fff8c24aba6b4..3ec35a8436c5b6775837996ccacb27c6bfb01716 100644
--- a/src/hb-blob.h
+++ b/src/hb-blob.h
@@ -86,9 +86,6 @@ hb_blob_unlock (hb_blob_t *blob);
 hb_bool_t
 hb_blob_is_writable (hb_blob_t *blob);
 
-hb_bool_t
-hb_blob_try_writable_inplace (hb_blob_t *blob);
-
 hb_bool_t
 hb_blob_try_writable (hb_blob_t *blob);