diff --git a/sigil/common/core/src/org/apache/felix/sigil/config/BldFactory.java b/sigil/common/core/src/org/apache/felix/sigil/config/BldFactory.java
index 8160bd6..dc98eec 100644
--- a/sigil/common/core/src/org/apache/felix/sigil/config/BldFactory.java
+++ b/sigil/common/core/src/org/apache/felix/sigil/config/BldFactory.java
@@ -67,7 +67,7 @@
         return project;
     }
 
-    private static BldProject load(URI uri, boolean ignoreCache, Properties overrides) throws IOException
+    private synchronized static BldProject load(URI uri, boolean ignoreCache, Properties overrides) throws IOException
     {
         BldProject p = null;
         if (!ignoreCache)