diff --git a/config b/config
index 27eaf82..378ef2e 100755
--- a/config
+++ b/config
@@ -1,10 +1,17 @@
 # Installation directories
+
+# Default prefix
+PREFIX = /usr/local
+
 # System's libraries directory (where binary libraries are installed)
-LUA_LIBDIR= /usr/local/lib/lua/5.0
+LUA_LIBDIR= $(PREFIX)/lib/lua/5.1
+
 # System's lua directory (where Lua libraries are installed)
-LUA_DIR= /usr/local/share/lua/5.0
+LUA_DIR= $(PREFIX)/share/lua/5.1
+
 # Lua includes directory
-LUA_INC= /usr/local/include
+LUA_INC= $(PREFIX)/include
+
 # Expat includes directory
 EXPAT_INC= /usr/local/include