--- src/bin/ibuild/ibed.c.org	Wed Nov 11 03:16:15 1992
+++ src/bin/ibuild/ibed.c	Wed Jan  5 22:42:25 2000
@@ -672,7 +672,7 @@
     return tools;
 }
 
-static const unit = 15;
+static const int unit = 15;
 
 static Coord xClosed[] = { unit/5, unit, unit, unit*3/5, 0 };
 static Coord yClosed[] = { 0, unit/5, unit*3/5, unit, unit*2/5 };