diff --git a/common/utils/T/tracer/gui/x.c b/common/utils/T/tracer/gui/x.c
index 6f87de442051dde0ecdfc85a0359e85984260c9d..af3d05cc14b68936fa6be574e35b8e53f0201e21 100644
--- a/common/utils/T/tracer/gui/x.c
+++ b/common/utils/T/tracer/gui/x.c
@@ -331,7 +331,7 @@ void x_text_get_dimensions(x_connection *_c, int font, const char *t,
   struct x_connection *c = _c;
   XGlyphInfo ext;
 
-  XftTextExtents8(c->d, c->fonts[font], (FcChar8 *)t, strlen(t), &ext);
+  XftTextExtentsUtf8(c->d, c->fonts[font], (FcChar8 *)t, strlen(t), &ext);
 
   *width = ext.width;
   *height = c->fonts[font]->height;
@@ -372,7 +372,7 @@ void x_draw_string(x_connection *_c, x_window *_w, int font, int color,
   struct x_connection *c = _c;
   struct x_window *w = _w;
   int tlen = strlen(t);
-  XftDrawString8(w->xft, &c->xft_colors[color], c->fonts[font],
+  XftDrawStringUtf8(w->xft, &c->xft_colors[color], c->fonts[font],
       x, y, (const unsigned char *)t, tlen);
 }