diff --git a/ChangeLog b/ChangeLog
index bc8e968f42..e8c59ac293 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2008-06-19  Johan Dahlin  <jdahlin@async.com.br>
 
+	* gtk/gtkhsv.c (paint_ring, paint_triangle):
+	Cast buf to unsigned char to avoid two compiler
+	warnings.
+
 	* gtk/gtkclist.c:
 	* gtk/gtkstyle.c (gtk_style_finalize):
 	Do not ignore the return value of g_slist_remove.
diff --git a/gtk/gtkhsv.c b/gtk/gtkhsv.c
index f6a8133651..4d3a69a44c 100644
--- a/gtk/gtkhsv.c
+++ b/gtk/gtkhsv.c
@@ -952,7 +952,7 @@ paint_ring (GtkHSV      *hsv,
 	}
     }
 
-  source = cairo_image_surface_create_for_data ((char *)buf,
+  source = cairo_image_surface_create_for_data ((unsigned char *)buf,
 						CAIRO_FORMAT_RGB24,
 						width, height, stride);
 
@@ -1164,7 +1164,7 @@ paint_triangle (GtkHSV      *hsv,
       }
     }
 
-  source = cairo_image_surface_create_for_data ((char *)buf,
+  source = cairo_image_surface_create_for_data ((unsigned char *)buf,
 						CAIRO_FORMAT_RGB24,
 						width, height, stride);