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-rw-r--r--graph.c1
-rw-r--r--graph.h4
2 files changed, 3 insertions, 2 deletions
diff --git a/graph.c b/graph.c
index d7bdbe5f..1194510e 100644
--- a/graph.c
+++ b/graph.c
@@ -29,6 +29,7 @@
#include <gtk/gtk.h>
#include "tickmarks.h"
+#include "graph.h"
struct xyvalue {
double x, y;
diff --git a/graph.h b/graph.h
index 39dd2b0e..7c3e862b 100644
--- a/graph.h
+++ b/graph.h
@@ -14,8 +14,8 @@ void graph_title(struct graph *g, const char *title);
void graph_x_title(struct graph *g, const char *title);
void graph_y_title(struct graph *g, const char *title);
void graph_add_label(struct graph *g, const char *label);
-void graph_add_data(struct graph *g, const char *label, const double value);
-void graph_add_xy_data(struct graph *g, const char *label,
+int graph_add_data(struct graph *g, const char *label, const double value);
+int graph_add_xy_data(struct graph *g, const char *label,
const double x, const double y);
void graph_set_color(struct graph *g, const char *label,
double red, double green, double blue);