diff --git a/src/hb-buffer.c b/src/hb-buffer.c
index 33416610a..2a566b1c8 100644
--- a/src/hb-buffer.c
+++ b/src/hb-buffer.c
@@ -180,7 +180,7 @@ hb_buffer_set_direction (hb_buffer_t    *buffer,
 
 /* HarfBuzz-Internal API */
 
-HB_INTERNAL void
+void
 _hb_buffer_clear_output (hb_buffer_t *buffer)
 {
   buffer->out_length = 0;
@@ -202,7 +202,7 @@ hb_buffer_clear_positions (hb_buffer_t *buffer)
   memset (buffer->positions, 0, sizeof (buffer->positions[0]) * buffer->in_length);
 }
 
-HB_INTERNAL void
+void
 _hb_buffer_swap (hb_buffer_t *buffer)
 {
   unsigned int tmp;
@@ -244,7 +244,7 @@ _hb_buffer_swap (hb_buffer_t *buffer)
 
    The cluster value for the glyph at position buffer->in_pos is used
    for all replacement glyphs */
-HB_INTERNAL void
+void
 _hb_buffer_add_output_glyphs (hb_buffer_t *buffer,
 			      unsigned int num_in,
 			      unsigned int num_out,
@@ -286,7 +286,7 @@ _hb_buffer_add_output_glyphs (hb_buffer_t *buffer,
 }
 
 
-HB_INTERNAL void
+void
 _hb_buffer_add_output_glyph (hb_buffer_t *buffer,
 			     hb_codepoint_t glyph_index,
 			     unsigned short component,
@@ -315,7 +315,7 @@ _hb_buffer_add_output_glyph (hb_buffer_t *buffer,
   buffer->out_length = buffer->out_pos;
 }
 
-HB_INTERNAL void
+void
 _hb_buffer_next_glyph (hb_buffer_t *buffer)
 {
   if (buffer->out_string != buffer->in_string)
@@ -331,14 +331,14 @@ _hb_buffer_next_glyph (hb_buffer_t *buffer)
   buffer->out_length = buffer->out_pos;
 }
 
-HB_INTERNAL void
+void
 _hb_buffer_replace_glyph (hb_buffer_t *buffer,
 			  hb_codepoint_t glyph_index)
 {
   _hb_buffer_add_output_glyph (buffer, glyph_index, 0xFFFF, 0xFFFF);
 }
 
-HB_INTERNAL unsigned short
+unsigned short
 _hb_buffer_allocate_lig_id (hb_buffer_t *buffer)
 {
   return ++buffer->max_lig_id;
diff --git a/src/hb-glib.c b/src/hb-glib.c
index 3e4b4505b..c3c1153bd 100644
--- a/src/hb-glib.c
+++ b/src/hb-glib.c
@@ -40,7 +40,7 @@ static unsigned int hb_glib_get_eastasian_width_nil (hb_codepoint_t unicode) { r
 
 
 hb_unicode_funcs_t *
-hb_glib_unicode_funcs_create (void)
+hb_glib_get_unicode_funcs (void)
 {
   if (HB_UNLIKELY (!glib_ufuncs)) {
     glib_ufuncs = hb_unicode_funcs_create ();
@@ -50,6 +50,8 @@ hb_glib_unicode_funcs_create (void)
     hb_unicode_funcs_set_script_func (glib_ufuncs, hb_glib_get_script_nil);
     hb_unicode_funcs_set_combining_class_func (glib_ufuncs, hb_glib_get_combining_class_nil);
     hb_unicode_funcs_set_eastasian_width_func (glib_ufuncs, hb_glib_get_eastasian_width_nil);
+
+    hb_unicode_funcs_make_immutable (glib_ufuncs);
   }
 
   return hb_unicode_funcs_reference (glib_ufuncs);
diff --git a/src/hb-glib.h b/src/hb-glib.h
index 6a7f5508a..6c9499322 100644
--- a/src/hb-glib.h
+++ b/src/hb-glib.h
@@ -27,14 +27,14 @@
 #ifndef HB_GLIB_H
 #define HB_GLIB_H
 
-#include "hb-common.h"
+#include "hb.h"
 
 #include "hb-unicode.h"
 
 HB_BEGIN_DECLS
 
 hb_unicode_funcs_t *
-hb_glib_unicode_funcs_create (void);
+hb_glib_get_unicode_funcs (void);
 
 HB_END_DECLS
 
diff --git a/src/hb-ot-layout.cc b/src/hb-ot-layout.cc
index fd7deb635..8d0a25a49 100644
--- a/src/hb-ot-layout.cc
+++ b/src/hb-ot-layout.cc
@@ -101,7 +101,7 @@ hb_ot_layout_has_font_glyph_classes (hb_face_t *face)
   return _get_gdef (face).has_glyph_classes ();
 }
 
-HB_INTERNAL hb_bool_t
+hb_bool_t
 _hb_ot_layout_has_new_glyph_classes (hb_face_t *face)
 {
   return face->ot_layout.new_gdef.len > 0;
@@ -131,7 +131,7 @@ _hb_ot_layout_get_glyph_property (hb_face_t      *face,
   }
 }
 
-HB_INTERNAL hb_bool_t
+hb_bool_t
 _hb_ot_layout_check_glyph_property (hb_face_t    *face,
 				    hb_internal_glyph_info_t *ginfo,
 				    unsigned int  lookup_flags,
@@ -170,7 +170,7 @@ _hb_ot_layout_check_glyph_property (hb_face_t    *face,
   return true;
 }
 
-HB_INTERNAL hb_bool_t
+hb_bool_t
 _hb_ot_layout_skip_mark (hb_face_t    *face,
 			 hb_internal_glyph_info_t *ginfo,
 			 unsigned int  lookup_flags,
@@ -203,7 +203,7 @@ _hb_ot_layout_skip_mark (hb_face_t    *face,
   return false;
 }
 
-HB_INTERNAL void
+void
 _hb_ot_layout_set_glyph_class (hb_face_t                  *face,
 			       hb_codepoint_t              glyph,
 			       hb_ot_layout_glyph_class_t  klass)
@@ -252,7 +252,7 @@ _hb_ot_layout_set_glyph_class (hb_face_t                  *face,
   return;
 }
 
-HB_INTERNAL void
+void
 _hb_ot_layout_set_glyph_property (hb_face_t      *face,
 				  hb_codepoint_t  glyph,
 				  unsigned int    property)
diff --git a/src/hb-private.h b/src/hb-private.h
index 98b322fbb..dbeafef13 100644
--- a/src/hb-private.h
+++ b/src/hb-private.h
@@ -106,7 +106,7 @@ typedef GStaticMutex hb_mutex_t;
 #define MIN(a,b) ((a) < (b) ? (a) : (b))
 
 #ifndef HB_INTERNAL
-# define HB_INTERNAL
+# define HB_INTERNAL extern
 #endif
 
 #ifndef NULL