1 files changed, 1 insertions, 1 deletions
diff --git a/deco.c b/deco.c
index 4bddad576..87899b5ee 100644
--- a/deco.c
+++ b/deco.c
@@ -90,7 +90,7 @@ static double tissue_tolerance_calc(const struct dive *dive)
 	double ret_tolerance_limit_ambient_pressure = 0.0;
 	double gf_high = buehlmann_config.gf_high;
 	double gf_low = buehlmann_config.gf_low;
-	double surface = dive->dc.surface_pressure.mbar / 1000.0;
+	double surface = get_surface_pressure_in_mbar(dive, TRUE) / 1000.0;
 	double lowest_ceiling;
 
 	for (ci = 0; ci < 16; ci++)