diff --git a/Makefile b/Makefile
index 5341c70..caf9d48 100644
--- a/Makefile
+++ b/Makefile
@@ -42,7 +42,7 @@ dist-clean:
 	-rm ${PROG}-${VERSION}.tar.gz
 
 install:
-	install -d -m 755 {PREFIX}/bin/
+	install -d -m 755 ${PREFIX}/bin/
 	install -c -S -s -o root -g bin -m 755 xmem ${PREFIX}/bin/xmem
 	install -d -m 755 ${PREFIX}/man/man1/
 	install -c -o root -g bin -m 644 xmem.1 ${PREFIX}/man/man1/xmem.1