diff --git a/src/chemistry/geoschem/mo_sim_dat.F90 b/src/chemistry/geoschem/mo_sim_dat.F90
index 3e422175f9..3c365bfe07 100644
--- a/src/chemistry/geoschem/mo_sim_dat.F90
+++ b/src/chemistry/geoschem/mo_sim_dat.F90
@@ -183,13 +183,13 @@ subroutine set_sim_dat
       fix_mass(:  6) = (/ 0.00000000_r8, 28.0134800_r8, 31.9988000_r8, 2.020000_r8,  32.050000_r8, &
                           74.090000_r8 /)
 
-      adv_mass(:269) = (/  58.090000_r8,  60.060000_r8, 126.900000_r8,  44.060000_r8,  58.120000_r8, &
+      adv_mass(:271) = (/  58.090000_r8,  60.060000_r8, 126.900000_r8,  44.060000_r8,  58.120000_r8, &
                           150.000000_r8, 150.000000_r8, 150.000000_r8, 150.000000_r8, 150.000000_r8, &
                           150.00000_r8,  150.000000_r8,  189.12_r8, 68.08_r8, 98.10_r8, &
                           90.0900000_r8, 106.12_r8, 12.010000_r8,  12.010000_r8, &
                           78.120000_r8, 110.11_r8, 79.900000_r8, 159.800000_r8, 115.450000_r8, &
                           125.910000_r8, 141.910000_r8,  95.900000_r8,  79.900000_r8,  &
-                          79.900000_r8, 138.12_r8, 183.12_r8, 26.05_r8, 28.05_r8, 30.080000_r8, &
+                          79.900000_r8, 84.07_r8, 138.12_r8, 183.12_r8, 26.05_r8,  28.05_r8, 30.080000_r8, &
                            44.110000_r8, 153.820000_r8, 137.370000_r8, 187.380000_r8, 170.920000_r8, &
                           154.470000_r8, 120.910000_r8, 173.830000_r8,  84.930000_r8, 267.840000_r8, &
                           220.840000_r8, 176.380000_r8,  30.030000_r8,  94.940000_r8, 133.350000_r8, &
@@ -197,7 +197,7 @@ subroutine set_sim_dat
                            35.450000_r8,  70.900000_r8, 102.910000_r8,  81.450000_r8,  97.450000_r8, &
                            51.450000_r8,  67.450000_r8,   1.000000_r8,  28.010000_r8, 108.14_r8, 62.130000_r8, &
                            29.000000_r8,  29.000000_r8,  29.000000_r8,  29.000000_r8,  46.080000_r8, &
-                          105.060000_r8, 107.07_r8, 78.07_r8, 91.080000_r8,  62.080000_r8,  60.060000_r8,  58.040000_r8, &
+                          105.060000_r8, 107.07_r8, 78.07_r8, 91.080000_r8,  62.080000_r8,  68.07_r8, 60.060000_r8,  58.040000_r8, &
                           165.360000_r8, 148.910000_r8, 259.820000_r8,  18.020000_r8,  34.020000_r8, &
                            74.080000_r8,  80.910000_r8, 100.130000_r8, 152.930000_r8, 116.940000_r8, &
                           100.500000_r8,  86.470000_r8,  36.450000_r8,  46.030000_r8, 127.910000_r8, &