diff --git a/tests/performance/P110_C2H6O_lcao/STRU b/tests/performance/P110_C2H6O_lcao/STRU
index 2bfec20d9af..940b312edc1 100644
--- a/tests/performance/P110_C2H6O_lcao/STRU
+++ b/tests/performance/P110_C2H6O_lcao/STRU
@@ -9,7 +9,7 @@ NUMERICAL_ORBITAL
 ../../PP_ORB/H_gga_8au_100Ry_2s1p.orb
 
 LATTICE_CONSTANT
-1
+1.8897261254578281
 
 LATTICE_VECTORS
    28.00000     0.00000     0.00000