diff --git a/bin/build-libbitcoind b/bin/build-libbitcoind
index b2b6b782..6ba69f21 100755
--- a/bin/build-libbitcoind
+++ b/bin/build-libbitcoind
@@ -48,7 +48,7 @@ if [ -d "${root_dir}/libbitcoind" ]; then
   ${root_dir}/etc/bitcoin.patch."
     echo -n "Would you like to remove the current patch, checkout the tag: ${tag} and \
 apply the current patch from "${root_dir}"/etc/bitcoin.patch? (y/N): "
-    if [ $ASSUME_YES = true ]; then
+    if [ "${BITCOINDJS_ASSUME_YES}" = true ]; then
       input=y
       echo ""
     else