diff --git a/cameo/templates/mkmk-simple b/cameo/templates/mkmk-simple
index c0fabfc..9a4befd 100755
--- a/cameo/templates/mkmk-simple
+++ b/cameo/templates/mkmk-simple
@@ -106,11 +106,13 @@ cng:
 		\$(CNGT) -57.4 20 mill.gp
 
 plot:
-		echo 'plot "drill.gp" with points, "mill.gp" with lines' | \\
+		echo 'set size square; \
+		  plot "drill.gp" with points, "mill.gp" with lines' | \\
 		  gnuplot -persist
 
 dplot:
-		echo 'plot "< sed /^\$\$/d drill.gp" with linespoints' | \\
+		echo 'set size square; \
+		  plot "< sed /^\$\$/d drill.gp" with linespoints' | \\
 		  gnuplot -persist
 
 clean::