diff --git a/src/events/pointer.js b/src/events/pointer.js
index 0cfaafd8ae..4a8226c43a 100644
--- a/src/events/pointer.js
+++ b/src/events/pointer.js
@@ -24,6 +24,10 @@ function pointer(p5, fn, lifecycles){
         signal: this._removeSignal
       });
     }
+
+    window.addEventListener('blur', () => {
+      this.mouseIsPressed = false;
+    }, { signal: this._removeSignal });
   };
 
   /**
diff --git a/test/unit/events/mouse.js b/test/unit/events/mouse.js
index baa956925c..144a475bc1 100644
--- a/test/unit/events/mouse.js
+++ b/test/unit/events/mouse.js
@@ -251,6 +251,13 @@ suite.todo('Mouse Events', function() {
       window.dispatchEvent(new MouseEvent('mousedown'));
       assert.strictEqual(myp5.mouseIsPressed, true);
     });
+
+    test('mouseIsPressed should reset to false on blur', function() {
+      window.dispatchEvent(new PointerEvent('pointerdown'));
+      assert.strictEqual(myp5.mouseIsPressed, true);
+      window.dispatchEvent(new Event('blur'));
+      assert.strictEqual(myp5.mouseIsPressed, false);
+    });
   });
 
   suite('mouseMoved', function() {