diff --git a/src/main/java/re/imc/geysermodelenginepackgenerator/GeneratorMain.java b/src/main/java/re/imc/geysermodelenginepackgenerator/GeneratorMain.java
index b3437f0..6f8e821 100644
--- a/src/main/java/re/imc/geysermodelenginepackgenerator/GeneratorMain.java
+++ b/src/main/java/re/imc/geysermodelenginepackgenerator/GeneratorMain.java
@@ -344,7 +344,9 @@ public class GeneratorMain {
                     continue;
                 }
                 try {
-                    ImageIO.write(entry.getValue().getImage(), "png", path.toFile());
+                    if (entry.getValue().getImage() != null) {
+                        ImageIO.write(entry.getValue().getImage(), "png", path.toFile());
+                    }
                 } catch (IOException e) {
                     e.printStackTrace();
                 }