diff --git a/src/org/violetlib/jnr/impl/ReusableCompositor.java b/src/org/violetlib/jnr/impl/ReusableCompositor.java
index 49ea059..3f31c19 100644
--- a/src/org/violetlib/jnr/impl/ReusableCompositor.java
+++ b/src/org/violetlib/jnr/impl/ReusableCompositor.java
@@ -248,6 +248,7 @@ public void reset(int rasterWidth, int rasterHeight, int scaleFactor)
         this.rasterWidth = rasterWidth;
         this.rasterHeight = rasterHeight;
         this.scaleFactor = scaleFactor;
+        isConfigured = false;
         isEmpty = true;
     }