diff --git a/mithril.js b/mithril.js
index 2f66d2cc..a030481b 100644
--- a/mithril.js
+++ b/mithril.js
@@ -1090,7 +1090,7 @@
 		tag,
 		namespace
 	) {
-		if (!(attrName in cachedAttrs) || (cachedAttr !== dataAttr)) {
+		if (!(attrName in cachedAttrs) || (cachedAttr !== dataAttr) || ($document.activeElement === node)) {
 			cachedAttrs[attrName] = dataAttr
 			try {
 				return setSingleAttr(