diff --git a/packages/rax-server-renderer/package.json b/packages/rax-server-renderer/package.json
index e16af02980..99f6c81f1d 100644
--- a/packages/rax-server-renderer/package.json
+++ b/packages/rax-server-renderer/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rax-server-renderer",
-  "version": "1.0.0",
+  "version": "1.0.2",
   "description": "Rax renderer for server-side render.",
   "license": "BSD-3-Clause",
   "main": "lib/index.js",
diff --git a/packages/rax-server-renderer/src/index.js b/packages/rax-server-renderer/src/index.js
index 4d2039a08e..142c6f7153 100644
--- a/packages/rax-server-renderer/src/index.js
+++ b/packages/rax-server-renderer/src/index.js
@@ -97,7 +97,7 @@ function styleToCSS(style, remRatio) {
       // Noop
     } else if (typeof val === 'number' || typeof val === 'string' && NUMBER_REGEXP.test(val)) {
       unit = 'rem';
-    } else if (val.indexOf('rem') > -1) {
+    } else if (typeof val === 'string' && val.indexOf('rem') > -1) {
       // stylesheet-loader will transform padding: 40 to paddingTop: '40rem' ...
       val = parseFloat(val);
       unit = 'rem';