diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index a3cad32..319574e 100755
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -128,8 +128,8 @@ if [ -n "${PERIPHERAL_VOLUME_STEP}" ]; then
   EXTRA_ARGS+=( "--peripheral-volume-step" "$PERIPHERAL_VOLUME_STEP" )
 fi
 
-if [ -n "$DISABLE_PERIPHERAL_API" = "1" ]; then
-  EXTRA_ARGS+=( "--disable-peripheral-api" "$DISABLE_PERIPHERAL_API" )
+if [ "$DISABLE_PERIPHERAL_API" = "1" ]; then
+  EXTRA_ARGS+=( "--disable-peripheral-api" )
 fi
 
 if [ "$ENABLE_OUTPUT_ONLY" = "1" ]; then