diff --git a/core/modules/system/css/system.diff.css b/core/modules/system/css/system.diff.css
index e57e6ebe0e7a7ede6b63e8b6e111e0bcaf48b940..f8b95e92e3e088a1770707a715d74da8c80f07f3 100644
--- a/core/modules/system/css/system.diff.css
+++ b/core/modules/system/css/system.diff.css
@@ -4,7 +4,6 @@
 table.diff {
   border-spacing: 4px;
   margin-bottom: 20px;
-  table-layout: fixed;
   width: 100%;
 }
 table.diff .diff-context {
diff --git a/core/themes/stable/css/system/system.diff.css b/core/themes/stable/css/system/system.diff.css
index e57e6ebe0e7a7ede6b63e8b6e111e0bcaf48b940..f8b95e92e3e088a1770707a715d74da8c80f07f3 100644
--- a/core/themes/stable/css/system/system.diff.css
+++ b/core/themes/stable/css/system/system.diff.css
@@ -4,7 +4,6 @@
 table.diff {
   border-spacing: 4px;
   margin-bottom: 20px;
-  table-layout: fixed;
   width: 100%;
 }
 table.diff .diff-context {