diff --git a/scripts/diff.sh b/scripts/diff.sh
index ce50cdf..5230eca 100755
--- a/scripts/diff.sh
+++ b/scripts/diff.sh
@@ -35,7 +35,7 @@ if [[ ! -f "$migration" ]]; then
   ./scripts/build.sh base "$base" 1>&2 || (echo "base failed to build" && exit 1)
   ./scripts/build.sh head "$head" 1>&2 || (echo "head failed to build" && exit 1)
 
-  local waited=0
+  waited=0
   until pg_isready --quiet --username "$POSTGRES_USER" -p 5432 && \
         pg_isready --quiet --username "$POSTGRES_USER" -p 5433; do
     if [[ "$waited" = 10 ]]; then