diff --git a/src/library.h b/src/library.h
index 43e10d8c75..e4dffc63d1 100644
--- a/src/library.h
+++ b/src/library.h
@@ -45,7 +45,7 @@ int lammps_get_natoms(void *);
 void lammps_gather_atoms(void *, char *, int, int, void *);
 void lammps_scatter_atoms(void *, char *, int, int, void *);
 
-#ifdef LAMMPS_EXCEPTION
+#ifdef LAMMPS_EXCEPTIONS
 int lammps_has_error(void *);
 int lammps_get_last_error_message(void *, char *, int);
 #endif