diff --git a/lib/components/term.js b/lib/components/term.js
index f8c6900c..eaca996d 100644
--- a/lib/components/term.js
+++ b/lib/components/term.js
@@ -55,7 +55,12 @@ export default class Term extends PureComponent {
     }
 
     if (props.onActive) {
-      this.term.on('focus', props.onActive);
+      this.term.on('focus', () => {
+        // xterm@2 emits this event 2 times. Will be fixed in xterm@3.
+        if (!this.props.isTermActive) {
+          props.onActive();
+        }
+      });
     }
 
     if (props.onData) {