--- a\src\iup_draw.c	Tue May 16 16:22:56 2017
+++ b\src\iup_draw.c	Tue Jan 16 22:59:52 2018
@@ -561,8 +561,7 @@
 
 void iupFlatDrawArrow(IdrawCanvas* dc, int x, int y, int size, const char* color, const char* bgcolor, int active, int dir)
 {
-  int points[6];
-
+  int points[6] = {0};
   int off1 = iupRound((double)size * 0.13);
   int off2 = iupRound((double)size * 0.87);
   int half = size / 2;