--- xlock/iostuff.c
+++ xlock/iostuff.c
@@ -567,7 +567,7 @@
 			if (!blogo.data) {
 				if (BitmapSuccess == XbmReadFileToImage(bitmap_local,
 						 &blogo.width, &blogo.height,
-					   (unsigned char **) &blogo.data)) {
+					   &blogo.data)) {
 					blogo.bytes_per_line = (blogo.width + 7) / 8;
 					*graphics_format = IS_XBMFILE;
 					*logo = &blogo;
--- xlock/vroot.h
+++ xlock/vroot.h
@@ -108,7 +108,7 @@
 					 __SWM_VROOT, 0, 1, False, XA_WINDOW,
 						&actual_type, &actual_format,
 							&nitems, &bytesafter,
-							(unsigned char **) &newRoot) == Success && newRoot) {
+							&newRoot) == Success && newRoot) {
 						root = *newRoot;
 						break;
 					}