diff --git a/configure b/configure
index 38fb4b0..0947aba 100755
--- a/configure
+++ b/configure
@@ -141,7 +141,7 @@ EOF
 
 done
 
-source ${QP_ROOT}/quack.rc
+source ${QUACK_ROOT}/quack.rc
 
 NINJA=$(find_exe ninja)
 if [[ ${NINJA} = $(not_found) ]] ; then