diff --git a/cameo/lang.l b/cameo/lang.l
index eb7ccbc..a6048b9 100644
--- a/cameo/lang.l
+++ b/cameo/lang.l
@@ -49,6 +49,7 @@ NUM	-?[0-9]+\.?[0-9]*
 <INITIAL>mill			return TOK_MILL;
 <INITIAL>offset			return TOK_OFFSET;
 <INITIAL>optimize		return TOK_OPTIMIZE;
+<INITIAL>outside		return TOK_OUTSIDE;
 <INITIAL>remainder		return TOK_REMAINDER;
 <INITIAL>remore			return TOK_REMOVE;
 <INITIAL>reset			return TOK_RESET;
diff --git a/cameo/lang.y b/cameo/lang.y
index e3c9c00..1c12aae 100644
--- a/cameo/lang.y
+++ b/cameo/lang.y
@@ -188,7 +188,8 @@ static struct path **classify(struct path **anchor, struct path *path)
 
 
 %token		TOK_ALIGN TOK_AREA TOK_ARRAY TOK_CLEAR TOK_DRILL TOK_EMPTY
-%token		TOK_KEEP TOK_MILL TOK_OFFSET TOK_OPTIMIZE TOK_REMAINDER
+%token		TOK_KEEP TOK_MILL TOK_OFFSET TOK_OPTIMIZE
+%token		TOK_OUTSIDE TOK_REMAINDER
 %token		TOK_REMOVE TOK_RESET
 %token		TOK_REVERSE TOK_ROTATE TOK_STATS TOK_TRANSLATE TOK_Z
 %token		TOK_APPEND TOK_GERBER TOK_GNUPLOT TOK_EXCELLON TOK_WRITE
@@ -256,6 +257,19 @@ command:
 		{
 			paths = optimize_paths(paths);
 		}
+	| TOK_OUTSIDE
+		{
+			struct path *a;
+			struct path *b;
+
+			for (a = paths; a; a = a->next) {
+				for (b = paths; b; b = b->next)
+					if (a != b && path_is_inside(a, b))
+						break;
+				if (!b)
+					a->outside = 1;
+			}
+		}
 	| TOK_REVERSE
 		{
 			struct path *tmp;