diff --git a/Makefile.m4 b/Makefile.m4
index a6a100b..bf7c041 100644
--- a/Makefile.m4
+++ b/Makefile.m4
@@ -30,8 +32,10 @@ LINK.o	=$(LINK.cc)
 # to install set-root-uid, `make BIN_MODE=04755 install'...
 BIN_MODE?=0755
 install:	dvd+rw-tools
-	install -o root -m $(BIN_MODE) $(CHAIN) /usr/bin
-	install -o root -m 0644 growisofs.1 /usr/share/man/man1
+	install -d $(prefix)/bin
+	install -d $(prefix)/share/man/man1
+	install -m $(BIN_MODE) $(CHAIN) $(prefix)/bin
+	install -m 0644 growisofs.1 $(prefix)/share/man/man1
 ])
 
 ifelse(OS,MINGW32,[