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-rw-r--r--bin/Makefile2
1 files changed, 2 insertions, 0 deletions
diff --git a/bin/Makefile b/bin/Makefile
index d68d1cc5..6b6452aa 100644
--- a/bin/Makefile
+++ b/bin/Makefile
@@ -54,6 +54,8 @@ scheme.h: scheme
 open pbcopy pbpaste: pbd
 	ln -f pbd $@
 
+psf2png.o scheme.o: png.h
+
 scheme.png: scheme
 	./scheme -t -g > scheme.png