diff --git a/lib/krb5/pcache.c b/lib/krb5/pcache.c
index 51913ba41..980449027 100644
--- a/lib/krb5/pcache.c
+++ b/lib/krb5/pcache.c
@@ -58,9 +58,9 @@ cc_plugin_register_to_context(krb5_context context, const void *plug, void *plug
     return KRB5_PLUGIN_NO_HANDLE;
 }
 
-static const char *ccache_plugin_deps[] = { "krb5", NULL };
+static const char *const ccache_plugin_deps[] = { "krb5", NULL };
 
-static struct heim_plugin_data
+static const struct heim_plugin_data
 ccache_plugin_data = {
     "krb5",
     KRB5_PLUGIN_CCACHE,