diff --git a/BasiliskII/src/Unix/video_vosf.h b/BasiliskII/src/Unix/video_vosf.h
index 0c1ec9fd..b97b8dc5 100644
--- a/BasiliskII/src/Unix/video_vosf.h
+++ b/BasiliskII/src/Unix/video_vosf.h
@@ -130,13 +130,13 @@ static void do_fbcopy_raw(uint8 * dest, const uint8 * source, uint32 length)
 #define FB_FUNC_NAME do_fbcopy_16_nbo
 #include "video_blit.h"
 
-// opposite byte order (untested)
+// opposite byte order
 
 #define FB_BLIT_1(dst, src) \
-	(dst = ((((src) >> 6) & 0xff) | (((src) & 0x60) << 9)))
+	(dst = ((((src) >> 7) & 0xff) | (((src) << 9) & 0xc000) | (((src) << 8) & 0x1f00)))
 
 #define FB_BLIT_2(dst, src) \
-	(dst = ((((src) >> 6) & 0x00ff00ff) | (((src) & 0x00600060) << 9)))
+	(dst = ((((src) >> 7) & 0x00ff00ff) | (((src) << 9) & 0xc000c000) | (((src) << 8) & 0x1f001f00)))
 
 #define FB_DEPTH 16
 #define FB_FUNC_NAME do_fbcopy_16_obo
@@ -214,7 +214,7 @@ static fbcopy_func fbcopy_funcs[ID_DEPTH_COUNT][2][2] = {
 /*  1 bpp */	{	WD(fbcopy_raw)		,	WD(fbcopy_raw)		},	// NT
 /*  8 bpp */	{	WD(fbcopy_raw)		,	WD(fbcopy_raw)		},	// OK (NBO)
 /* 15 bpp */	{	WD(fbcopy_15_obo)	,	WD(fbcopy_raw)		},	// NT
-/* 16 bpp */	{	WD(fbcopy_16_obo)	,	WD(fbcopy_16_nbo)	},	// NT
+/* 16 bpp */	{	WD(fbcopy_16_obo)	,	WD(fbcopy_16_nbo)	},	// OK (OBO)
 /* 24 bpp */	{	WD(fbcopy_24_obo)	,	WD(fbcopy_raw)		}	// NT
 #else
 				/*	opposite byte order		native byte order	*/
diff --git a/BasiliskII/src/Unix/video_x.cpp b/BasiliskII/src/Unix/video_x.cpp
index dfea4cb9..58488937 100644
--- a/BasiliskII/src/Unix/video_x.cpp
+++ b/BasiliskII/src/Unix/video_x.cpp
@@ -518,9 +518,9 @@ static bool init_window(int width, int height)
 	// Set VideoMonitor
 	bool native_byte_order;
 #ifdef WORDS_BIGENDIAN
-	native_byte_order = (img->bitmap_bit_order == MSBFirst);
+	native_byte_order = (XImageByteOrder(x_display) == MSBFirst);
 #else
-	native_byte_order = (img->bitmap_bit_order == LSBFirst);
+	native_byte_order = (XImageByteOrder(x_display) == LSBFirst);
 #endif
 #ifdef ENABLE_VOSF
 	do_update_framebuffer = GET_FBCOPY_FUNC(depth, native_byte_order, DISPLAY_WINDOW);