diff --git a/guacamole-docker/bin/start.sh b/guacamole-docker/bin/start.sh
index 23cfdb831..be05f276f 100755
--- a/guacamole-docker/bin/start.sh
+++ b/guacamole-docker/bin/start.sh
@@ -769,12 +769,12 @@ END
     set_property          "saml-idp-metadata-url"            "$SAML_IDP_METADATA_URL"
     set_optional_property "saml-idp-url"                     "$SAML_IDP_URL"
     set_optional_property "saml-entity-id"                   "$SAML_ENTITY_ID"
-	set_optional_property "saml-callback-url"                "$SAML_CALLBACK_URL"
-	set_optional_property "saml-strict"                      "$SAML_STRICT"
-	set_optional_property "saml-debug"                       "$SAML_DEBUG"
-	set_optional_property "saml-compress-request"            "$SAML_COMPRESS_REQUEST"
-	set_optional_property "saml-compress-response"           "$SAML_COMPRESS_RESPONSE"
-	set_optional_property "saml-group-attribute"             "SAML_GROUP_ATTRIBUTE"
+    set_optional_property "saml-callback-url"                "$SAML_CALLBACK_URL"
+    set_optional_property "saml-strict"                      "$SAML_STRICT"
+    set_optional_property "saml-debug"                       "$SAML_DEBUG"
+    set_optional_property "saml-compress-request"            "$SAML_COMPRESS_REQUEST"
+    set_optional_property "saml-compress-response"           "$SAML_COMPRESS_RESPONSE"
+    set_optional_property "saml-group-attribute"             "SAML_GROUP_ATTRIBUTE"
 
     # Add required .jar files to GUACAMOLE_EXT
     # "1-{}" make it sorted as a first provider (only authentication)