diff --git a/plugins/org.eclipse.mat.jdt/src/org/eclipse/mat/jdt/OpenSourceFileJob.java b/plugins/org.eclipse.mat.jdt/src/org/eclipse/mat/jdt/OpenSourceFileJob.java
index ebb8ddc22..9ba5a9f06 100644
--- a/plugins/org.eclipse.mat.jdt/src/org/eclipse/mat/jdt/OpenSourceFileJob.java
+++ b/plugins/org.eclipse.mat.jdt/src/org/eclipse/mat/jdt/OpenSourceFileJob.java
@@ -77,7 +77,7 @@ protected IStatus run(IProgressMonitor monitor)
             preparePattern();
             if (methodName != null)
                 collectMethodMatches(monitor);
-            if (matches.isEmpty())
+            if (matches == null || matches.isEmpty())
                 collectMatches(monitor);
             displayResult();