diff --git a/include/polarssl/pk.h b/include/polarssl/pk.h
index b08f5e3..251c690 100644
--- a/include/polarssl/pk.h
+++ b/include/polarssl/pk.h
@@ -112,7 +112,7 @@
 typedef struct
 {
     pk_debug_type type;
-    char *name;
+    const char *name;
     void *value;
 } pk_debug_item;