diff --git a/include/cantera/kinetics/reaction_defs.h b/include/cantera/kinetics/reaction_defs.h
index df902ae0a..e8c696ac5 100644
--- a/include/cantera/kinetics/reaction_defs.h
+++ b/include/cantera/kinetics/reaction_defs.h
@@ -110,13 +110,6 @@ const int SRI3_FALLOFF  = 112;
 const int SRI5_FALLOFF  = 113;
 const int WF_FALLOFF = 114;
 //@}
-
-// error flags
-const int NO_ERROR = 0;
-const int UNKNOWN_REACTION_TYPE = -100;
-const int UNKNOWN_RATE_COEFF_TYPE = -200;
-const int NOT_YET_IMPLEMENTED = -300;
-
 }
 
 #endif