diff --git a/unittest/fortran/wrap_configuration.cpp b/unittest/fortran/wrap_configuration.cpp
index 0161a80125..91a10d0687 100644
--- a/unittest/fortran/wrap_configuration.cpp
+++ b/unittest/fortran/wrap_configuration.cpp
@@ -39,7 +39,7 @@ int f_lammps_has_id(const char *, const char *);
 int f_lammps_id_count(const char *);
 char *f_lammps_id_name(const char *, int);
 int f_lammps_plugin_count();
-int f_lammps_plugin_name();
+int f_lammps_plugin_name(int, const char*, const char*);
 }
 namespace LAMMPS_NS {
 
@@ -347,7 +347,7 @@ TEST_F(LAMMPS_configuration, plugins)
 #else
     int nplugins = f_lammps_plugin_count();
     for (int n = 0; n < nplugins; n++) {
-        lammpsplugin_t *plugin = plugin_get_info(n);
+        auto *plugin = plugin_get_info(n);
         EXPECT_EQ(f_lammps_plugin_name(n + 1, plugin->style, plugin->name), 1);
     }
 #endif