--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-PREFIX = /usr/local
+PREFIX = /usr
 DOTTY = dot
 
 samples = \
@@ -62,7 +62,7 @@
 install:
 	install -m755 -D codecgraph $(DESTDIR)$(PREFIX)/bin/codecgraph
 	install -m755 -D codecgraph.py $(DESTDIR)$(PREFIX)/bin/codecgraph.py
-	install -m644 -D codecgraph.1 $(DESTDIR)$(PREFIX)/man/man1/codecgraph.1
+	install -m644 -D codecgraph.1 $(DESTDIR)$(PREFIX)/share/man/man1/codecgraph.1
 
 thumbs: png
 	for p in $(pngfiles);do \