diff --git a/changelog.d/11368.misc b/changelog.d/11368.misc
new file mode 100644
index 0000000000..d623935865
--- /dev/null
+++ b/changelog.d/11368.misc
@@ -0,0 +1 @@
+Fix running `scripts-dev/complement.sh`, which was broken in v1.47.0rc1.
diff --git a/scripts-dev/complement.sh b/scripts-dev/complement.sh
index 7d38b39e90..89af7a4fde 100755
--- a/scripts-dev/complement.sh
+++ b/scripts-dev/complement.sh
@@ -24,7 +24,7 @@
 set -e
 
 # Change to the repository root
-cd "$(dirname "$0")/.."
+cd "$(dirname $0)/.."
 
 # Check for a user-specified Complement checkout
 if [[ -z "$COMPLEMENT_DIR" ]]; then
@@ -61,8 +61,8 @@ cd "$COMPLEMENT_DIR"
 EXTRA_COMPLEMENT_ARGS=""
 if [[ -n "$1" ]]; then
   # A test name regex has been set, supply it to Complement
-  EXTRA_COMPLEMENT_ARGS=(-run "$1")
+  EXTRA_COMPLEMENT_ARGS+="-run $1 "
 fi
 
 # Run the tests!
-go test -v -tags synapse_blacklist,msc2946,msc3083,msc2403,msc2716 -count=1 "${EXTRA_COMPLEMENT_ARGS[@]}" ./tests/...
+go test -v -tags synapse_blacklist,msc2946,msc3083,msc2403,msc2716 -count=1 $EXTRA_COMPLEMENT_ARGS ./tests/...