diff --git a/textscreen/txt_label.c b/textscreen/txt_label.c
index 191064cd..07834f46 100644
--- a/textscreen/txt_label.c
+++ b/textscreen/txt_label.c
@@ -168,7 +168,7 @@ void TXT_SetLabel(txt_label_t *label, const char *value)
     }
 }
 
-txt_label_t *TXT_NewLabel(char *text)
+txt_label_t *TXT_NewLabel(const char *text)
 {
     txt_label_t *label;
 
diff --git a/textscreen/txt_label.h b/textscreen/txt_label.h
index 546e83e6..8700c326 100644
--- a/textscreen/txt_label.h
+++ b/textscreen/txt_label.h
@@ -49,7 +49,7 @@ struct txt_label_s
  * @return              Pointer to the new label widget.
  */
 
-txt_label_t *TXT_NewLabel(char *label);
+txt_label_t *TXT_NewLabel(const char *label);
 
 /**
  * Set the string displayed in a label widget.