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-rw-r--r--riscos/buffer.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/riscos/buffer.c b/riscos/buffer.c
index e53156bbc..7176c1c1c 100644
--- a/riscos/buffer.c
+++ b/riscos/buffer.c
@@ -40,8 +40,12 @@
/** Absent from OSLib
*/
+#ifndef osspriteop_TYPEEXPANSION
#define osspriteop_TYPEEXPANSION ((osspriteop_mode_word) 0xFu)
+#endif
+#ifndef osspriteop_TYPE16BPP4K
#define osspriteop_TYPE16BPP4K ((osspriteop_mode_word) 0x10u)
+#endif
static void ro_gui_buffer_free(void);