diff --git a/src/text-field.jsx b/src/text-field.jsx
index 6cefe0aa747f0b..c8a674f262f378 100644
--- a/src/text-field.jsx
+++ b/src/text-field.jsx
@@ -417,7 +417,13 @@ const TextField = React.createClass({
   },
 
   _getFontSize() {
-    return this.props.style && this.props.style.fontSize ? this.props.style.fontSize : 16;
+    if (this.props.style && this.props.style.fontSize) {
+        if (process.env.NODE_ENV !== 'production' && typeof this.props.style.fontSize !== 'number') {
+            console.warn('style.fontSize property does not support non-integer values');
+        }
+        return this.props.style.fontSize;
+    }
+    return 16;
   },
 
   _getRef() {