1 files changed, 3 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 48ac1ab8..eec4fdbf 100644
--- a/Makefile
+++ b/Makefile
@@ -251,6 +251,9 @@ $(CLOBBER_SIZE_NCGR_FILES): %.NCGR: %.png
 $(CLOBBER_SIZE_VERSION101_NCGR_FILES): %.NCGR: %.png
 	$(GFX) $< $@ -clobbersize -version101
 
+$(VERSION101_SOPC_8BPP_NCGR_FILES): %.NCGR: %.png
+	$(GFX) $< $@ -version101 -sopc -bitdepth 8
+
 %.NCLR: %.png
 	$(GFX) $< $@