diff --git a/php.editor/src/org/netbeans/modules/php/editor/nav/OccurrencesFinderImpl.java b/php.editor/src/org/netbeans/modules/php/editor/nav/OccurrencesFinderImpl.java
--- a/php.editor/src/org/netbeans/modules/php/editor/nav/OccurrencesFinderImpl.java
+++ b/php.editor/src/org/netbeans/modules/php/editor/nav/OccurrencesFinderImpl.java
@@ -49,6 +49,9 @@
 import java.util.Map;
 import java.util.Set;
 import java.util.TreeSet;
+import java.util.concurrent.CountDownLatch;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 import java.util.prefs.Preferences;
 import org.netbeans.api.lexer.Token;
 import org.netbeans.api.lexer.TokenHierarchy;
@@ -70,6 +73,7 @@
 import org.netbeans.modules.php.editor.model.OccurencesSupport;
 import org.netbeans.modules.php.editor.options.MarkOccurencesSettings;
 import org.netbeans.modules.php.editor.parser.PHPParseResult;
+import org.openide.util.RequestProcessor;
 
 /**
  *
@@ -78,9 +82,12 @@
  * @author Radek Matous
  */
 public class OccurrencesFinderImpl extends OccurrencesFinder {
+    private static final RequestProcessor RP = new RequestProcessor(OccurrencesFinderImpl.class);
+    private static final Logger LOGGER = Logger.getLogger(OccurrencesFinderImpl.class.getName());
     private Map<OffsetRange, ColoringAttributes> range2Attribs;
     private int caretPosition;
     private volatile boolean cancelled;
+    private CountDownLatch latch = new CountDownLatch(1);
 
     @Override
     public void setCaretPosition(int position) {
@@ -89,6 +96,11 @@
 
     @Override
     public Map<OffsetRange, ColoringAttributes> getOccurrences() {
+        try {
+            latch.await();
+        } catch (InterruptedException ex) {
+            LOGGER.log(Level.FINE, null, ex);
+        }
         return range2Attribs;
     }
 
@@ -98,32 +110,40 @@
     }
 
     @Override
-    public void run(Result result, SchedulerEvent event) {
-        //remove the last occurrences - the CSL caches the last found occurences for us
-        range2Attribs = null;
+    public void run(final Result result, SchedulerEvent event) {
+        latch = new CountDownLatch(1);
+        RP.post(new Runnable() {
 
-        if (cancelled) {
-            cancelled = false;
-            return;
-        }
+            @Override
+            public void run() {
+                //remove the last occurrences - the CSL caches the last found occurences for us
+                range2Attribs = null;
 
-        Preferences node = MarkOccurencesSettings.getCurrentNode();
-        Map<OffsetRange, ColoringAttributes> localRange2Attribs = new HashMap<OffsetRange, ColoringAttributes>();
-        if (node.getBoolean(MarkOccurencesSettings.ON_OFF, true)) {
-            for (OffsetRange r : compute((ParserResult) result, caretPosition)) {
-                localRange2Attribs.put(r, ColoringAttributes.MARK_OCCURRENCES);
+                if (cancelled) {
+                    cancelled = false;
+                    return;
+                }
+
+                Preferences node = MarkOccurencesSettings.getCurrentNode();
+                Map<OffsetRange, ColoringAttributes> localRange2Attribs = new HashMap<OffsetRange, ColoringAttributes>();
+                if (node.getBoolean(MarkOccurencesSettings.ON_OFF, true)) {
+                    for (OffsetRange r : compute((ParserResult) result, caretPosition)) {
+                        localRange2Attribs.put(r, ColoringAttributes.MARK_OCCURRENCES);
+                    }
+                }
+
+                if (cancelled) {
+                    cancelled = false;
+                    return;
+                }
+
+                if (!node.getBoolean(MarkOccurencesSettings.KEEP_MARKS, true) || localRange2Attribs.size() > 0) {
+                    //store the occurrences if not empty, return null in getOccurrences() otherwise
+                    range2Attribs = localRange2Attribs;
+                }
+                latch.countDown();
             }
-        }
-
-        if (cancelled) {
-            cancelled = false;
-            return;
-        }
-
-        if (!node.getBoolean(MarkOccurencesSettings.KEEP_MARKS, true) || localRange2Attribs.size() > 0) {
-            //store the occurrences if not empty, return null in getOccurrences() otherwise
-            range2Attribs = localRange2Attribs;
-        }
+        });
     }
 
     static Collection<OffsetRange> compute(final ParserResult parameter, final int offset) {