diff --git a/platform/lang-api/src/com/intellij/codeInsight/completion/AbstractCompletionContributor.java b/platform/lang-api/src/com/intellij/codeInsight/completion/AbstractCompletionContributor.java
index 8eab3559f61f..8628ac28d2a6 100644
--- a/platform/lang-api/src/com/intellij/codeInsight/completion/AbstractCompletionContributor.java
+++ b/platform/lang-api/src/com/intellij/codeInsight/completion/AbstractCompletionContributor.java
@@ -42,7 +42,8 @@ public abstract class AbstractCompletionContributor<Params extends CompletionPar
                                              final ProcessingContext context) {
     return ApplicationManager.getApplication().runReadAction(new Computable<Boolean>() {
       public Boolean compute() {
-        return pattern.accepts(parameters.getPosition(), context);
+        PsiElement position = parameters.getPosition();
+        return position.isValid() && pattern.accepts(position, context);
       }
     }).booleanValue();
   }
diff --git a/platform/lang-api/src/com/intellij/codeInsight/completion/CompletionProvider.java b/platform/lang-api/src/com/intellij/codeInsight/completion/CompletionProvider.java
index fab4c674a441..ee7937d06903 100644
--- a/platform/lang-api/src/com/intellij/codeInsight/completion/CompletionProvider.java
+++ b/platform/lang-api/src/com/intellij/codeInsight/completion/CompletionProvider.java
@@ -39,7 +39,9 @@ public abstract class CompletionProvider<V extends CompletionParameters> {
     if (myStartInReadAction) {
       ApplicationManager.getApplication().runReadAction(new Runnable() {
         public void run() {
-          addCompletions(parameters, context, result);
+          if (parameters.getPosition().isValid()) {
+            addCompletions(parameters, context, result);
+          }
         }
       });
     } else {