diff --git a/app/src/main/kotlin/com/simplemobiletools/draw/views/MyCanvas.kt b/app/src/main/kotlin/com/simplemobiletools/draw/views/MyCanvas.kt
index f5fd1d7..37d3357 100644
--- a/app/src/main/kotlin/com/simplemobiletools/draw/views/MyCanvas.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/draw/views/MyCanvas.kt
@@ -121,7 +121,7 @@ class MyCanvas(context: Context, attrs: AttributeSet) : View(context, attrs) {
     }
 
     fun setBrushSize(newBrushSize: Float) {
-        mPaintOptions.strokeWidth = resources.getDimension(R.dimen.full_brush_size) * (newBrushSize / 100f)
+        mPaintOptions.strokeWidth = resources.getDimension(R.dimen.full_brush_size) * (newBrushSize / mScaleFactor / 100f)
     }
 
     fun setAllowZooming(allowZooming: Boolean) {