diff --git a/modules/programs/i3status-rust.nix b/modules/programs/i3status-rust.nix
index 69785fea3..33f2b146d 100644
--- a/modules/programs/i3status-rust.nix
+++ b/modules/programs/i3status-rust.nix
@@ -144,8 +144,8 @@ in {
             {
               block = "memory";
               display_type = "memory";
-              format_mem = "{Mup}%";
-              format_swap = "{SUp}%";
+              format_mem = "{mem_used_percents}";
+              format_swap = "{swap_used_percents}";
             }
             {
               block = "cpu";
diff --git a/tests/modules/programs/i3status-rust/with-default.nix b/tests/modules/programs/i3status-rust/with-default.nix
index 4a0d4a4c4..9fdda7e89 100644
--- a/tests/modules/programs/i3status-rust/with-default.nix
+++ b/tests/modules/programs/i3status-rust/with-default.nix
@@ -28,8 +28,8 @@ with lib;
             [[block]]
             block = "memory"
             display_type = "memory"
-            format_mem = "{Mup}%"
-            format_swap = "{SUp}%"
+            format_mem = "{mem_used_percents}"
+            format_swap = "{swap_used_percents}"
 
             [[block]]
             block = "cpu"