diff --git a/app/src/main/java/se/ajpanton/notificationlog/ZoomImageView.kt b/app/src/main/java/se/ajpanton/notificationlog/ZoomImageView.kt
index df1fb6b..8c483bd 100644
--- a/app/src/main/java/se/ajpanton/notificationlog/ZoomImageView.kt
+++ b/app/src/main/java/se/ajpanton/notificationlog/ZoomImageView.kt
@@ -96,6 +96,9 @@ class ZoomImageView @JvmOverloads constructor(
 
     init {
         scaleType = ScaleType.MATRIX
+        // We implement double-tap-and-drag ourselves below. Leaving Android's
+        // quick-scale enabled makes both handlers modify the same matrix.
+        scaleDetector.isQuickScaleEnabled = false
     }
 
     override fun setImageBitmap(bitmap: Bitmap?) {