diff --git a/Cantera/src/equil/vcs_solve_TP.cpp b/Cantera/src/equil/vcs_solve_TP.cpp
index dc77b016f..bc660e603 100644
--- a/Cantera/src/equil/vcs_solve_TP.cpp
+++ b/Cantera/src/equil/vcs_solve_TP.cpp
@@ -2118,7 +2118,7 @@ namespace VCSnonideal {
 	a = 100.0;
       }
       tmp = -dg_irxn / (1.0 + a);
-      if (tmp < 200.) {
+      if (tmp < -200.) {
 	tmp = -200.;
       } else if ( tmp > 200.) {
 	tmp = 200.;