diff --git a/src/wp-includes/js/media/models.js b/src/wp-includes/js/media/models.js
index e475446a8f..6653ccba91 100644
--- a/src/wp-includes/js/media/models.js
+++ b/src/wp-includes/js/media/models.js
@@ -1230,7 +1230,7 @@ Query = Attachments.extend({
 
 			// Determine which page to query.
 			if ( -1 !== args.posts_per_page ) {
-				args.paged = Math.floor( this.length / args.posts_per_page ) + 1;
+				args.paged = Math.round( this.length / args.posts_per_page ) + 1;
 			}
 
 			options.data.query = args;
diff --git a/src/wp-includes/js/media/models/query.js b/src/wp-includes/js/media/models/query.js
index 0ca84a788c..29d361a60c 100644
--- a/src/wp-includes/js/media/models/query.js
+++ b/src/wp-includes/js/media/models/query.js
@@ -138,7 +138,7 @@ Query = Attachments.extend({
 
 			// Determine which page to query.
 			if ( -1 !== args.posts_per_page ) {
-				args.paged = Math.floor( this.length / args.posts_per_page ) + 1;
+				args.paged = Math.round( this.length / args.posts_per_page ) + 1;
 			}
 
 			options.data.query = args;