diff --git a/CHANGELOG.md b/CHANGELOG.md
index e48193b..1f4c9f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -33,6 +33,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fixed formatting error in `.github/workflows/stale.yml` that caused the Mark Stale Issues action not to run
 - Now flag differences greater than +/- 10% in benchmark timing table outputs
 - Fixed error in computation of dynamic ratio plot min & max values in `plot/six_plot.py`
+- Fixed erroneous species classification in `gcpy/benchmark/modules/benchmark_categories.yml`
 
 ### Removed
 - Removed `gcpy/benchmark/modules/species_database.yml` file and corresponding code pointing to this
diff --git a/gcpy/benchmark/modules/benchmark_categories.yml b/gcpy/benchmark/modules/benchmark_categories.yml
index 04ca479..0abb78b 100644
--- a/gcpy/benchmark/modules/benchmark_categories.yml
+++ b/gcpy/benchmark/modules/benchmark_categories.yml
@@ -70,7 +70,7 @@ FullChemBenchmark:
       - HCl
       - Halons
       - HCFCs
-      - OClO    
+      - OClO
   Iodine:
     Iodine:
       - Iy
@@ -122,7 +122,7 @@ FullChemBenchmark:
       - O3
       - CO
       - OH
-      - NOx    
+      - NOx
   Primary_Organics:
     Alcohols:
       - EOH
@@ -186,13 +186,20 @@ FullChemBenchmark:
   Secondary_Organics:
     Acids:
       - ACTA
+      - HACTA
+      - HCOOH
+      - MAP
+      - RCOOH
     Aldehydes:
       - ACR
       - ALD2
       - BALD
       - CH2O
+      - GLYC
+      - GLYX
       - HPALDs
       - MACR
+      - RCHO
     Epoxides:
       - IEPOX
     Ketones:
@@ -204,13 +211,8 @@ FullChemBenchmark:
       - ISOPN
     Other:
       - FURA
-      - GLYC
-      - GLYX
-      - HCOOH
-      - RCOOH
-      - MAP
       - PHEN
-      - RCHO
+      - TLFUONE
     Peroxides:
       - ETHP
       - MP