diff --git a/input/kinetics/libraries/Fluoromethane/dictionary.txt b/input/kinetics/libraries/Fluoromethane/dictionary.txt
index 80f342cf1b..1f147b5bf9 100644
--- a/input/kinetics/libraries/Fluoromethane/dictionary.txt
+++ b/input/kinetics/libraries/Fluoromethane/dictionary.txt
@@ -759,8 +759,9 @@ H2O
 3 H u0 p0 c0 {1,S}
 
 O2
-1 O u0 p2 c0 {2,D}
-2 O u0 p2 c0 {1,D}
+multiplicity 3
+1 O u1 p2 c0 {2,S}
+2 O u1 p2 c0 {1,S}
 
 HO2
 multiplicity 2