diff --git a/calmwm.h b/calmwm.h
index 4bc97f4..8c06db4 100644
--- a/calmwm.h
+++ b/calmwm.h
@@ -481,7 +481,7 @@ void			 xu_ewmh_net_wm_number_of_desktops(struct screen_ctx *);
 void			 xu_ewmh_net_showing_desktop(struct screen_ctx *);
 void			 xu_ewmh_net_virtual_roots(struct screen_ctx *);
 void			 xu_ewmh_net_current_desktop(struct screen_ctx *, long);
-void			 xu_ewmh_net_desktop_names(struct screen_ctx *, unsigned char *, int);
+void			 xu_ewmh_net_desktop_names(struct screen_ctx *, char *, int);
 
 void			 xu_ewmh_net_wm_desktop(struct client_ctx *);
 
diff --git a/group.c b/group.c
index dd748ea..cf431c6 100644
--- a/group.c
+++ b/group.c
@@ -472,7 +472,7 @@ group_update_names(struct screen_ctx *sc)
 	strings = xmalloc((nstrings < CALMWM_NGROUPS ? CALMWM_NGROUPS :
 	    nstrings) * sizeof(*strings));
 
-	p = prop_ret;
+	p = (char *)prop_ret;
 	while (n < nstrings) {
 		strings[n++] = xstrdup(p);
 		p += strlen(p) + 1;
@@ -502,7 +502,7 @@ group_update_names(struct screen_ctx *sc)
 static void
 group_set_names(struct screen_ctx *sc)
 {
-	unsigned char	*p, *q;
+	char		*p, *q;
 	size_t		 len = 0, tlen, slen;
 	int		 i;
 
diff --git a/xutil.c b/xutil.c
index bcde1c5..110ce87 100644
--- a/xutil.c
+++ b/xutil.c
@@ -188,7 +188,7 @@ xu_getstrprop(Window win, Atom atm, char **text) {
 			XTextProperty    prop2;
 			if (Xutf8TextListToTextProperty(X_Dpy, list, nitems,
 			    XUTF8StringStyle, &prop2) == Success) {
-				*text = xstrdup(prop2.value);
+				*text = xstrdup((const char *)prop2.value);
 				XFree(prop2.value);
 			}
 		} else {
@@ -292,7 +292,8 @@ xu_ewmh_net_supported_wm_check(struct screen_ctx *sc)
 	XChangeProperty(X_Dpy, w, ewmh[_NET_SUPPORTING_WM_CHECK].atom,
 	    XA_WINDOW, 32, PropModeReplace, (unsigned char *)&w, 1);
 	XChangeProperty(X_Dpy, w, ewmh[_NET_WM_NAME].atom,
-	    XA_WM_NAME, 8, PropModeReplace, WMNAME, strlen(WMNAME));
+	    XA_WM_NAME, 8, PropModeReplace, (unsigned char *)WMNAME,
+	    strlen(WMNAME));
 }
 
 void
@@ -396,10 +397,10 @@ xu_ewmh_net_current_desktop(struct screen_ctx *sc, long idx)
 }
 
 void
-xu_ewmh_net_desktop_names(struct screen_ctx *sc, unsigned char *data, int n)
+xu_ewmh_net_desktop_names(struct screen_ctx *sc, char *data, int n)
 {
 	XChangeProperty(X_Dpy, sc->rootwin, ewmh[_NET_DESKTOP_NAMES].atom,
-	    cwmh[UTF8_STRING].atom, 8, PropModeReplace, data, n);
+	    cwmh[UTF8_STRING].atom, 8, PropModeReplace, (unsigned char *)data, n);
 }
 
 /* Application Window Properties */