diff --git a/packages/material-ui/src/Container/Container.js b/packages/material-ui/src/Container/Container.js
index <HASH>..<HASH> 100644
--- a/packages/material-ui/src/Container/Container.js
+++ b/packages/material-ui/src/Container/Container.js
@@ -78,11 +78,12 @@ const ContainerRoot = experimentalStyled(
         maxWidth: Math.max(theme.breakpoints.values.xs, 444),
       },
     }),
-    ...(styleProps.maxWidth !== 'xs' && {
-      [theme.breakpoints.up(styleProps.maxWidth)]: {
-        maxWidth: `${theme.breakpoints.values[styleProps.maxWidth]}${theme.breakpoints.unit}`,
-      },
-    }),
+    ...(styleProps.maxWidth &&
+      styleProps.maxWidth !== 'xs' && {
+        [theme.breakpoints.up(styleProps.maxWidth)]: {
+          maxWidth: `${theme.breakpoints.values[styleProps.maxWidth]}${theme.breakpoints.unit}`,
+        },
+      }),
   }),
 );
[Container] Fix maxWidth="false" resulting in incorrect css (#<I>)