diff --git a/CHANGES b/CHANGES
index 212650cbd..719569bc2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2,6 +2,7 @@ CHANGES IN FLTK 1.1.7
 
 	- Documentation fixes (STR #648, STR #692, STR #730, STR
 	  #744, STR #745)
+	- FL_PLASTIC_DOWN_BOX drew with artifacts (STR #852)
 	- Changed initializations on WIN32 (STR #862)
 	- Fl_Preferences::getUserdataPath() didn't work for
 	  sub-groups (STR #872)
diff --git a/src/fl_plastic.cxx b/src/fl_plastic.cxx
index e8bbb9ffa..7b395f8a8 100644
--- a/src/fl_plastic.cxx
+++ b/src/fl_plastic.cxx
@@ -274,7 +274,7 @@ static void up_round(int x, int y, int w, int h, Fl_Color c) {
 
 
 static void down_frame(int x, int y, int w, int h, Fl_Color c) {
-  frame_rect(x, y, w, h - 1, "LLRRTTLL", c);
+  frame_rect(x, y, w, h - 1, "LLLLTTRR", c);
 }