diff --git a/base/nvti.c b/base/nvti.c
index 46ecd5b0..38d1bbbb 100644
--- a/base/nvti.c
+++ b/base/nvti.c
@@ -498,7 +498,7 @@ typedef struct nvtpref
  *         released using @ref nvtpref_free .
  */
 nvtpref_t *
-nvtpref_new (int id, gchar *name, gchar *type, gchar *dflt)
+nvtpref_new (int id, const gchar *name, const gchar *type, const gchar *dflt)
 {
   nvtpref_t *np = g_malloc0 (sizeof (nvtpref_t));
 
diff --git a/base/nvti.h b/base/nvti.h
index 1c0e8120..dbfbec9f 100644
--- a/base/nvti.h
+++ b/base/nvti.h
@@ -20,7 +20,7 @@
 typedef struct nvtpref nvtpref_t;
 
 nvtpref_t *
-nvtpref_new (int, gchar *, gchar *, gchar *);
+nvtpref_new (int, const gchar *, const gchar *, const gchar *);
 
 void
 nvtpref_free (nvtpref_t *);