diff --git a/src/library.cpp b/src/library.cpp
index 66a937148d..6c64e56bc2 100644
--- a/src/library.cpp
+++ b/src/library.cpp
@@ -3724,7 +3724,7 @@ specific :doc:`LAMMPS package <Packages>` provided as argument.
  * \param name string with the name of the package
  * \return 1 if included, 0 if not.
  */
-int lammps_config_has_package(char * name) {
+int lammps_config_has_package(const char *name) {
   return Info::has_package(name) ? 1 : 0;
 }
 
diff --git a/src/library.h b/src/library.h
index 6c01be7867..0c6ca184e5 100644
--- a/src/library.h
+++ b/src/library.h
@@ -152,7 +152,7 @@ void lammps_scatter_atoms_subset(void *, char *, int, int, int, int *, void *);
  * ---------------------------------------------------------------------- */
 
 int lammps_config_has_mpi_support();
-int lammps_config_has_package(char *);
+int lammps_config_has_package(const char *);
 int lammps_config_package_count();
 int lammps_config_package_name(int, char *, int);
 int lammps_config_has_gzip_support();