diff --git a/examples/inspect.js b/examples/inspect.js
index 9292450784..8ff759c127 100644
--- a/examples/inspect.js
+++ b/examples/inspect.js
@@ -165,7 +165,7 @@ function keyReleaseEvent(event) {
 }
 
 function mousePressEvent(event) {
-    if (alt) {
+    if (alt && !isActive) {
         isActive = true;
         mouseLastX = event.x;
         mouseLastY = event.y;