diff --git a/legacy/edje/src/lib/Edje.h b/legacy/edje/src/lib/Edje.h
index 23b759adec..13b591ade6 100644
--- a/legacy/edje/src/lib/Edje.h
+++ b/legacy/edje/src/lib/Edje.h
@@ -164,7 +164,7 @@ extern "C" {
    /* edje_util.c */
    EAPI void         edje_freeze                     (void);
    EAPI void         edje_thaw                       (void);
-   EAPI void         edje_fontset_append_set         (char *fonts);
+   EAPI void         edje_fontset_append_set         (const char *fonts);
    EAPI const char  *edje_fontset_append_get         (void);
 
    /* edje_load.c */
diff --git a/legacy/edje/src/lib/edje_util.c b/legacy/edje/src/lib/edje_util.c
index 2a07af229e..4802d0ab99 100644
--- a/legacy/edje/src/lib/edje_util.c
+++ b/legacy/edje/src/lib/edje_util.c
@@ -58,7 +58,7 @@ edje_thaw(void)
 
 /* FIXDOC: Expand */
 EAPI void
-edje_fontset_append_set(char *fonts)
+edje_fontset_append_set(const char *fonts)
 {
    if (_edje_fontset_append)
      free(_edje_fontset_append);