1 files changed, 1 insertions, 1 deletions
diff --git a/planner.c b/planner.c
index 21878b6c5..3bec66fe5 100644
--- a/planner.c
+++ b/planner.c
@@ -197,7 +197,7 @@ void fill_default_cylinder(cylinder_t *cyl)
 	}
 }
 
-int add_gas(struct dive *dive, int o2, int he)
+static int add_gas(struct dive *dive, int o2, int he)
 {
 	int i;
 	struct gasmix *mix;