diff --git a/sdk/jme3-core/src/com/jme3/gde/core/j2seproject/ProjectExtensionManager.java b/sdk/jme3-core/src/com/jme3/gde/core/j2seproject/ProjectExtensionManager.java
index 9e8fea565..000186f0f 100644
--- a/sdk/jme3-core/src/com/jme3/gde/core/j2seproject/ProjectExtensionManager.java
+++ b/sdk/jme3-core/src/com/jme3/gde/core/j2seproject/ProjectExtensionManager.java
@@ -444,7 +444,9 @@ public class ProjectExtensionManager {
                         fo.delete();
                     }
                     fo = FileUtil.createData(projectRoot, fileName);
-                    writeFile(str, fo);
+                    if (entry.getSize() != fo.getSize()) {
+                        writeFile(str, fo);
+                    }
                 }
             }
         } finally {