diff --git a/examples/pn53x-tamashell.c b/examples/pn53x-tamashell.c
index aad5006..9b2145a 100644
--- a/examples/pn53x-tamashell.c
+++ b/examples/pn53x-tamashell.c
@@ -103,7 +103,7 @@ int main(int argc, const char* argv[])
   }
 
   char *cmd;
-  char *prompt = "> ";
+  const char *prompt = "> ";
   while(1) {
     int offset = 0;
 #if defined(HAVE_READLINE)