diff --git a/info.c b/info.c
index 5cfe7286c..6834b1645 100644
--- a/info.c
+++ b/info.c
@@ -197,6 +197,8 @@ void update_air_info(char *buffer)
 {
 	char markup[120];
 	
+	if (! buffer)
+		buffer = EMPTY_AIRCONSUMPTION;
 	snprintf(markup, sizeof(markup), "<span font=\"8\">%s</span>",buffer);
 	gtk_label_set_markup(GTK_LABEL(airconsumption), markup);
 }
diff --git a/profile.c b/profile.c
index 0add26d08..7b3b88333 100644
--- a/profile.c
+++ b/profile.c
@@ -504,7 +504,7 @@ static void plot_info(struct dive *dive, struct graphics_context *gc)
 
 	airuse = calculate_airuse(dive);
 	if (!airuse) {
-		update_air_info("          \n          ");
+		update_air_info(NULL);
 		return;
 	}
 	switch (output_units.volume) {