diff --git a/licence.c b/licence.c
index a84a7dc..9a89ad2 100644
--- a/licence.c
+++ b/licence.c
@@ -53,7 +53,7 @@ static void
 licence_generate_hwid(uint8 * hwid)
 {
 	buf_out_uint32(hwid, 2);
-	strncpy(hwid + 4, hostname, LICENCE_HWID_SIZE - 4);
+	strncpy((char *)(hwid + 4), hostname, LICENCE_HWID_SIZE - 4);
 }
 
 /* Present an existing licence to the server */
diff --git a/xkeymap.c b/xkeymap.c
index 0363b3b..caf0895 100644
--- a/xkeymap.c
+++ b/xkeymap.c
@@ -38,7 +38,7 @@ extern int keylayout;
 extern BOOL enable_compose;
 
 static key_translation keymap[KEYMAP_SIZE];
-static unsigned int min_keycode;
+static int min_keycode;
 static uint16 remote_modifier_state = 0;
 
 static void
@@ -220,7 +220,7 @@ void
 xkeymap_init2(void)
 {
 	unsigned int max_keycode;
-	XDisplayKeycodes(display, &min_keycode, &max_keycode);
+	XDisplayKeycodes(display, &min_keycode, (int *)&max_keycode);
 }
 
 
diff --git a/xwin.c b/xwin.c
index 0805c43..ac16117 100644
--- a/xwin.c
+++ b/xwin.c
@@ -589,8 +589,8 @@ ui_create_bitmap(int width, int height, uint8 * data)
 
 	tdata = (owncolmap ? data : translate_image(width, height, data));
 	bitmap = XCreatePixmap(display, wnd, width, height, depth);
-	image = XCreateImage(display, visual, depth, ZPixmap, 0, tdata, width,
-			     height, 8, 0);
+	image = XCreateImage(display, visual, depth, ZPixmap, 0, (char *)tdata,
+			     width, height, 8, 0);
 
 	XPutImage(display, bitmap, gc, image, 0, 0, 0, 0, width, height);
 
@@ -608,8 +608,8 @@ ui_paint_bitmap(int x, int y, int cx, int cy, int width, int height,
 	uint8 *tdata;
 
 	tdata = (owncolmap ? data : translate_image(width, height, data));
-	image = XCreateImage(display, visual, depth, ZPixmap, 0, tdata, width,
-			     height, 8, 0);
+	image = XCreateImage(display, visual, depth, ZPixmap, 0, (char *)tdata,
+			     width, height, 8, 0);
 
 	if (ownbackstore)
 	{
@@ -645,8 +645,8 @@ ui_create_glyph(int width, int height, uint8 * data)
 	bitmap = XCreatePixmap(display, wnd, width, height, 1);
 	gc = XCreateGC(display, bitmap, 0, NULL);
 
-	image = XCreateImage(display, visual, 1, ZPixmap, 0, data, width,
-			     height, 8, scanline);
+	image = XCreateImage(display, visual, 1, ZPixmap, 0, (char *)data,
+			     width, height, 8, scanline);
 	image->byte_order = MSBFirst;
 	image->bitmap_bit_order = MSBFirst;
 	XInitImage(image);
@@ -1157,8 +1157,8 @@ ui_desktop_restore(uint32 offset, int x, int y, int cx, int cy)
 	if (data == NULL)
 		return;
 
-	image = XCreateImage(display, visual, depth, ZPixmap, 0, data, cx, cy,
-			     BitmapPad(display), cx * bpp / 8);
+	image = XCreateImage(display, visual, depth, ZPixmap, 0, (char *)data,
+			     cx, cy, BitmapPad(display), cx * bpp / 8);
 
 	if (ownbackstore)
 	{