diff --git a/src/gui/curses/gui-curses-window.c b/src/gui/curses/gui-curses-window.c
index d0c5a77fe..23cbcca53 100644
--- a/src/gui/curses/gui-curses-window.c
+++ b/src/gui/curses/gui-curses-window.c
@@ -193,7 +193,9 @@ gui_window_clear (WINDOW *window, int fg, int bg)
     else
         bg = gui_weechat_colors[bg & GUI_COLOR_EXTENDED_MASK].background;
 
-    wbkgdset (window, ' ' | COLOR_PAIR (gui_color_get_pair (fg, bg)) | attrs);
+    cchar_t c;
+    setcchar (&c, L" ", attrs, gui_color_get_pair (fg, bg), NULL);
+    wbkgrndset (window, &c);
     werase (window);
     wmove (window, 0, 0);
 }
@@ -205,9 +207,10 @@ gui_window_clear (WINDOW *window, int fg, int bg)
 void
 gui_window_clrtoeol (WINDOW *window)
 {
-    wbkgdset (window,
-              ' ' | COLOR_PAIR (gui_color_get_pair (gui_window_current_style_fg,
-                                                    gui_window_current_style_bg)));
+    cchar_t c;
+    setcchar (&c, L" ", A_NORMAL, gui_color_get_pair (gui_window_current_style_fg,
+                                                      gui_window_current_style_bg), NULL);
+    wbkgrndset (window, &c);
     wclrtoeol (window);
 }
 
@@ -282,9 +285,8 @@ gui_window_reset_style (WINDOW *window, int weechat_color)
     gui_window_current_style_bg = -1;
     gui_window_current_color_attr = 0;
 
-    wattroff (window, A_ALL_ATTR);
-    wattron (window, COLOR_PAIR(gui_color_weechat_get_pair (weechat_color)) |
-             gui_color[weechat_color]->attributes);
+    wattr_set (window, gui_color[weechat_color]->attributes,
+               gui_color_weechat_get_pair (weechat_color), NULL);
 }
 
 /*
@@ -297,8 +299,8 @@ gui_window_reset_color (WINDOW *window, int weechat_color)
     gui_window_current_style_fg = gui_color[weechat_color]->foreground;
     gui_window_current_style_bg = gui_color[weechat_color]->background;
 
-    wattron (window, COLOR_PAIR(gui_color_weechat_get_pair (weechat_color)) |
-             gui_color[weechat_color]->attributes);
+    wattron (window, gui_color[weechat_color]->attributes);
+    wcolor_set (window, gui_color_weechat_get_pair (weechat_color), NULL);
 }
 
 /*
@@ -333,7 +335,7 @@ gui_window_set_color (WINDOW *window, int fg, int bg)
     gui_window_current_style_fg = fg;
     gui_window_current_style_bg = bg;
 
-    wattron (window, COLOR_PAIR(gui_color_get_pair (fg, bg)));
+    wcolor_set (window, gui_color_get_pair (fg, bg), NULL);
 }
 
 /*
@@ -532,7 +534,7 @@ gui_window_set_custom_color_pair (WINDOW *window, int pair)
     if ((pair >= 0) && (pair <= gui_color_num_pairs))
     {
         gui_window_remove_color_style (window, A_ALL_ATTR);
-        wattron (window, COLOR_PAIR(pair));
+        wcolor_set (window, pair, NULL);
     }
 }
 
diff --git a/src/gui/curses/headless/ncurses-fake.c b/src/gui/curses/headless/ncurses-fake.c
index bb9982677..f91d274d0 100644
--- a/src/gui/curses/headless/ncurses-fake.c
+++ b/src/gui/curses/headless/ncurses-fake.c
@@ -316,6 +316,25 @@ wbkgdset (WINDOW *win, chtype ch)
     return OK;
 }
 
+void
+wbkgrndset (WINDOW *win, const cchar_t *wcval)
+{
+    (void) win;
+    (void) wcval;
+}
+
+int
+setcchar (cchar_t *wcval, const wchar_t *wch, attr_t attrs, short pair, const void *opts)
+{
+    (void) wcval;
+    (void) wch;
+    (void) attrs;
+    (void) pair;
+    (void) opts;
+
+    return OK;
+}
+
 void
 wchgat (WINDOW *win, int n, attr_t attr, short color, const void *opts)
 {
diff --git a/src/gui/curses/headless/ncurses-fake.h b/src/gui/curses/headless/ncurses-fake.h
index fdceb41b3..30b2ee319 100644
--- a/src/gui/curses/headless/ncurses-fake.h
+++ b/src/gui/curses/headless/ncurses-fake.h
@@ -20,6 +20,8 @@
 #ifndef WEECHAT_NCURSES_FAKE_H
 #define WEECHAT_NCURSES_FAKE_H
 
+#include <stddef.h>
+
 #define ERR (-1)
 #define OK  (0)
 
@@ -42,6 +44,7 @@
 #define COLOR_CYAN	6
 #define COLOR_WHITE	7
 
+#define A_NORMAL 0
 #define A_BOLD 0
 #define A_UNDERLINE 0
 #define A_REVERSE 0
@@ -70,6 +73,11 @@ typedef unsigned char bool;
 typedef int attr_t;
 typedef unsigned chtype;
 
+struct _cchar_t
+{
+};
+typedef struct _cchar_t cchar_t;
+
 extern WINDOW *stdscr;
 extern chtype acs_map[];
 
@@ -107,6 +115,8 @@ extern int curs_set (int visibility);
 extern int nodelay (WINDOW *win, bool bf);
 extern int werase (WINDOW *win);
 extern int wbkgdset (WINDOW *win, chtype ch);
+extern void wbkgrndset (WINDOW *win, const cchar_t *wcval);
+extern int setcchar (cchar_t *wcval, const wchar_t *wch, attr_t attrs, short pair, const void *opts);
 extern void wchgat (WINDOW *win, int n, attr_t attr, short color,
                     const void *opts);
 extern int mvwchgat (WINDOW *win, int y, int x, int n, attr_t attr, short pair,