diff --git a/ChangeLog b/ChangeLog
index 30f0b8cc7..f18109304 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2005-08-19  Kristian Høgsberg  <krh@redhat.com>
+
+	* src/cairo-ps-surface.c (cairo_ps_surface_set_dpi): Add this
+	missing fuction.
+
+	* src/cairo-pdf-surface.c (cairo_pdf_surface_create): Document
+	this funtion.
+
 2005-08-19  Carl Worth  <cworth@cworth.org>
 
 	Fix for bug #3915:
diff --git a/src/cairo-pdf-surface.c b/src/cairo-pdf-surface.c
index 6b863721e..204a0a3f7 100644
--- a/src/cairo-pdf-surface.c
+++ b/src/cairo-pdf-surface.c
@@ -336,6 +336,16 @@ cairo_pdf_surface_create (const char	*filename,
     return _cairo_pdf_surface_create_for_stream_internal (stream, width, height);
 }
 
+/**
+ * cairo__surface_set_dpi:
+ * @surface: a postscript cairo_surface_t
+ * @x_dpi: horizontal dpi
+ * @y_dpi: vertical dpi
+ * 
+ * Set horizontal and vertical resolution for image fallbacks.  When
+ * the pdf backend needs to fall back to image overlays, it will use
+ * this resolution.
+ **/
 void
 cairo_pdf_surface_set_dpi (cairo_surface_t	*surface,
 			   double		x_dpi,
diff --git a/src/cairo-ps-surface.c b/src/cairo-ps-surface.c
index 79ab65953..ccd7ad819 100644
--- a/src/cairo-ps-surface.c
+++ b/src/cairo-ps-surface.c
@@ -154,6 +154,27 @@ cairo_ps_surface_create_for_stream (cairo_write_func_t	write_func,
 							 height_in_points);
 }
 
+/**
+ * cairo_ps_surface_set_dpi:
+ * @surface: a postscript cairo_surface_t
+ * @x_dpi: horizontal dpi
+ * @y_dpi: vertical dpi
+ * 
+ * Set horizontal and vertical resolution for image fallbacks.  When
+ * the postscript backend needs to fall back to image overlays, it
+ * will use this resolution.
+ **/
+void
+cairo_ps_surface_set_dpi (cairo_surface_t *surface,
+			  double	   x_dpi,
+			  double	   y_dpi)
+{
+    cairo_ps_surface_t *ps_surface = (cairo_ps_surface_t *) surface;
+
+    ps_surface->x_dpi = x_dpi;    
+    ps_surface->y_dpi = y_dpi;    
+}
+
 static cairo_status_t
 _cairo_ps_surface_finish (void *abstract_surface)
 {