diff --git a/src/hb-cairo-utils.hh b/src/hb-cairo-utils.hh
index 4ab82123f..ccb86ba43 100644
--- a/src/hb-cairo-utils.hh
+++ b/src/hb-cairo-utils.hh
@@ -70,29 +70,33 @@ hb_paint_composite_mode_to_cairo (hb_paint_composite_mode_t mode)
   return CAIRO_OPERATOR_SOURCE;
 }
 
-hb_bool_t hb_cairo_paint_glyph_image (cairo_t *cr,
-                                      hb_blob_t *blob,
-                                      unsigned width,
-                                      unsigned height,
-                                      hb_tag_t format,
-                                      float slant,
-                                      hb_glyph_extents_t *extents);
+HB_INTERNAL hb_bool_t
+hb_cairo_paint_glyph_image (cairo_t *cr,
+			    hb_blob_t *blob,
+			    unsigned width,
+			    unsigned height,
+			    hb_tag_t format,
+			    float slant,
+			    hb_glyph_extents_t *extents);
 
-void hb_cairo_paint_linear_gradient (cairo_t *cr,
-                                     hb_color_line_t *color_line,
-                                     float x0, float y0,
-                                     float x1, float y1,
-                                     float x2, float y2);
+HB_INTERNAL void
+hb_cairo_paint_linear_gradient (cairo_t *cr,
+			        hb_color_line_t *color_line,
+			        float x0, float y0,
+			        float x1, float y1,
+			        float x2, float y2);
 
-void hb_cairo_paint_radial_gradient (cairo_t *cr,
-                                     hb_color_line_t *color_line,
-                                     float x0, float y0, float r0,
-                                     float x1, float y1, float r1);
+HB_INTERNAL void
+hb_cairo_paint_radial_gradient (cairo_t *cr,
+			        hb_color_line_t *color_line,
+			        float x0, float y0, float r0,
+			        float x1, float y1, float r1);
 
-void hb_cairo_paint_sweep_gradient (cairo_t *cr,
-                                    hb_color_line_t *color_line,
-                                    float x0, float y0,
-                                    float start_angle, float end_angle);
+HB_INTERNAL void
+hb_cairo_paint_sweep_gradient (cairo_t *cr,
+			       hb_color_line_t *color_line,
+			       float x0, float y0,
+			       float start_angle, float end_angle);
 
 
 #endif /* HB_CAIRO_UTILS_H */