diff --git a/config.mk.sh b/config.mk.sh
index 07a7f88..573bb45 100644
--- a/config.mk.sh
+++ b/config.mk.sh
@@ -1,4 +1,5 @@
 # make.sh config
+PREFIX=${PREFIX="/usr/local"}
 LOGDIR=${LOGDIR:-"/tmp/userrc"}
 
 BINDIR=${BINDIR:-"${PREFIX}/bin"}