diff --git a/openAIImages.m b/openAIImages.m
index 818d17b..479c60a 100644
--- a/openAIImages.m
+++ b/openAIImages.m
@@ -85,7 +85,7 @@
             %                          Only "dall-e-3" supports this parameter.
 
             arguments
-                this                    (1,1)  openAIImages
+                this                    (1,1) openAIImages
                 prompt                        {mustBeNonzeroLengthTextScalar}
                 nvp.NumImages           (1,1) {mustBePositive, mustBeInteger,...
                                                 mustBeLessThanOrEqual(nvp.NumImages,10)} = 1