diff --git a/src/micropolisj/build_tool/MakeTiles.java b/src/micropolisj/build_tool/MakeTiles.java
index 41600f6..d94ea94 100644
--- a/src/micropolisj/build_tool/MakeTiles.java
+++ b/src/micropolisj/build_tool/MakeTiles.java
@@ -176,8 +176,8 @@ public class MakeTiles
 		if (pngFile.exists()) {
 			pngFile.delete();
 		}
-		else if (!stagingDir.exists()) {
-			stagingDir.mkdir();
+		else {
+			pngFile.getParentFile().mkdirs();
 		}
 
 		String [] cmdline = {