diff --git a/bundles/org.eclipse.wst.sse.ui/src/org/eclipse/wst/sse/ui/contentassist/StructuredContentAssistProcessor.java b/bundles/org.eclipse.wst.sse.ui/src/org/eclipse/wst/sse/ui/contentassist/StructuredContentAssistProcessor.java
index 5e3f155..5b62980 100644
--- a/bundles/org.eclipse.wst.sse.ui/src/org/eclipse/wst/sse/ui/contentassist/StructuredContentAssistProcessor.java
+++ b/bundles/org.eclipse.wst.sse.ui/src/org/eclipse/wst/sse/ui/contentassist/StructuredContentAssistProcessor.java
@@ -468,7 +468,9 @@
 			while (iter.hasNext()) {
 				IContentAssistProcessor legacyProcessor = (IContentAssistProcessor) iter.next();
 				ICompletionProposal[] legacyComputed = legacyProcessor.computeCompletionProposals(viewer, offset);
-				proposals.addAll(Arrays.asList(legacyComputed));
+				if (legacyComputed != null) {
+					proposals.addAll(Arrays.asList(legacyComputed));
+				}
 			}
 		}