diff --git a/src/hb-buffer-private.hh b/src/hb-buffer-private.hh
index de72220a8..de698edea 100644
--- a/src/hb-buffer-private.hh
+++ b/src/hb-buffer-private.hh
@@ -55,12 +55,6 @@ _hb_buffer_swap (hb_buffer_t *buffer);
 HB_INTERNAL void
 _hb_buffer_clear_output (hb_buffer_t *buffer);
 
-HB_INTERNAL void
-_hb_buffer_replace_glyphs (hb_buffer_t *buffer,
-			   unsigned int num_in,
-			   unsigned int num_out,
-			   const hb_codepoint_t *glyph_data);
-
 HB_INTERNAL void
 _hb_buffer_replace_glyphs_be16 (hb_buffer_t *buffer,
 				unsigned int num_in,
@@ -125,10 +119,6 @@ struct _hb_buffer_t {
   inline void swap (void) { _hb_buffer_swap (this); }
   inline void clear_output (void) { _hb_buffer_clear_output (this); }
   inline void next_glyph (void) { _hb_buffer_next_glyph (this); }
-  inline void replace_glyphs (unsigned int num_in,
-			      unsigned int num_out,
-			      const hb_codepoint_t *glyph_data)
-  { _hb_buffer_replace_glyphs (this, num_in, num_out, glyph_data); }
   inline void replace_glyphs_be16 (unsigned int num_in,
 				   unsigned int num_out,
 				   const uint16_t *glyph_data_be)
diff --git a/src/hb-buffer.cc b/src/hb-buffer.cc
index 2461046f4..daf9d534b 100644
--- a/src/hb-buffer.cc
+++ b/src/hb-buffer.cc
@@ -310,33 +310,6 @@ _hb_buffer_swap (hb_buffer_t *buffer)
   buffer->i = 0;
 }
 
-void
-_hb_buffer_replace_glyphs (hb_buffer_t *buffer,
-			   unsigned int num_in,
-			   unsigned int num_out,
-			   const hb_codepoint_t *glyph_data)
-{
-  if (buffer->out_info != buffer->info ||
-      buffer->out_len + num_out > buffer->i + num_in)
-  {
-    if (unlikely (!_hb_buffer_ensure_separate (buffer, buffer->out_len + num_out)))
-      return;
-  }
-
-  hb_glyph_info_t orig_info = buffer->info[buffer->i];
-
-  for (unsigned int i = 0; i < num_out; i++)
-  {
-    hb_glyph_info_t *info = &buffer->out_info[buffer->out_len + i];
-    *info = orig_info;
-    info->codepoint = glyph_data[i];
-    info->gproperty() = HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN;
-  }
-
-  buffer->i  += num_in;
-  buffer->out_len += num_out;
-}
-
 void
 _hb_buffer_replace_glyphs_be16 (hb_buffer_t *buffer,
 				unsigned int num_in,