diff --git a/Source/read.f90 b/Source/read.f90
index 4cdc92a7d56..78b71ccfb2d 100644
--- a/Source/read.f90
+++ b/Source/read.f90
@@ -5234,7 +5234,7 @@ SUBROUTINE PROC_REAC_1
 
    IF(.NOT. RN%REVERSE) THEN
       IF (RN%REACTYPE==THREE_BODY_ARRHENIUS_TYPE) THEN
-         RN%A_SI = RN%A_IN*(1000._EB)**(-RN%RHO_EXPONENT)  ![kmol/m3]^(-sum(nu)). Here 1000 is for conversion from mol/cm3 to kmol/m3
+         RN%A_SI = RN%A_IN*(1000._EB)**(-RN%RHO_EXPONENT)  ![kmol/m3]^(-sum(nu)).
       ELSE
          RN%A_SI = RN%A_IN*(1000._EB)**(1-RN%RHO_EXPONENT) ![kmol/m3]^(1-sum(nu))
       ENDIF