diff --git a/helpers/deploy_client.sh b/helpers/deploy_client.sh
index 88489998daead5db00d9347cd0c80af37062e7d4..049a754e58a1063934b8e77acbacf125ade8bc53 100755
--- a/helpers/deploy_client.sh
+++ b/helpers/deploy_client.sh
@@ -2,7 +2,7 @@
 
 set -e
 
-if [ $# -ne 2 ] && [ $# -ne 3 ]; then
+if [ $# -ne 1 ] && [ $# -ne 2 ]; then
     echo "Usage: ./helpers/deploy_client.sh <values_base_dir> [<release_prefix>]"
     exit 1
 fi
diff --git a/helpers/deploy_mapcache.sh b/helpers/deploy_mapcache.sh
index ae254b6a0dc91007d2302ec822ae117910ec1e47..24b40e07e4aaae3050508b84a7237ddb73bb9f38 100755
--- a/helpers/deploy_mapcache.sh
+++ b/helpers/deploy_mapcache.sh
@@ -2,7 +2,7 @@
 
 set -e
 
-if [ $# -ne 2 ] && [ $# -ne 3 ]; then
+if [ $# -ne 1 ] && [ $# -ne 2 ]; then
     echo "Usage: ./helpers/deploy_mapcache.sh <values_base_dir> [<release_prefix>]"
     exit 1
 fi
diff --git a/helpers/deploy_mapserver.sh b/helpers/deploy_mapserver.sh
index b57dc0a8a654e70edb0a492cc272a68f73b54897..1a72d59f1782bc3d4c94df99a9b29ef992012621 100755
--- a/helpers/deploy_mapserver.sh
+++ b/helpers/deploy_mapserver.sh
@@ -2,7 +2,7 @@
 
 set -e
 
-if [ $# -ne 2 ] && [ $# -ne 3 ]; then
+if [ $# -ne 1 ] && [ $# -ne 2 ]; then
     echo "Usage: ./helpers/deploy_mapserver.sh <values_base_dir> [<release_prefix>]"
     exit 1
 fi
diff --git a/helpers/deploy_rabbitmq.sh b/helpers/deploy_rabbitmq.sh
index c6b4541ccc151dadbb70be3c92b463113c047590..89f5d71ea837894d3b702986e6b4afa3818faa33 100755
--- a/helpers/deploy_rabbitmq.sh
+++ b/helpers/deploy_rabbitmq.sh
@@ -2,8 +2,8 @@
 
 set -e
 
-if [ $# -ne 1 ]; then
-    echo "Usage: ./helpers/deploy_rabbitmq.sh <values_base_dir>"
+if [ $# -ne 1 ] && [ $# -ne 2 ]; then
+    echo "Usage: ./helpers/deploy_rabbitmq.sh <values_base_dir> [<release_prefix>]"
     exit 1
 fi