Added the ProjectionHistory header to main.h.

1 files changed, 1 insertions, 0 deletions

diff --git a/main.h b/main.h
index 52f94e6..7d94770 100644
--- a/main.h
+++ b/main.h
@@ -9,6 +9,7 @@
 #include "colorscale.h"
 #include "continuouscolorscale.h"
 #include "projectionobserver.h"
+#include "projectionhistory.h"
 #include "scatterplot.h"
 #include "voronoisplat.h"