diff --git a/platform/usageView/src/com/intellij/usages/ChunkExtractor.java b/platform/usageView/src/com/intellij/usages/ChunkExtractor.java
index b9db68c69ce3..ceba6f18df09 100644
--- a/platform/usageView/src/com/intellij/usages/ChunkExtractor.java
+++ b/platform/usageView/src/com/intellij/usages/ChunkExtractor.java
@@ -282,6 +282,7 @@ public class ChunkExtractor {
         ) {
         return true;
       }
+      if (key == null) continue;
       final TextAttributesKey fallbackAttributeKey = key.getFallbackAttributeKey();
       if (fallbackAttributeKey != null && isHighlightedAsComment(fallbackAttributeKey)) {
         return true;
@@ -295,6 +296,7 @@ public class ChunkExtractor {
       if (key == DefaultLanguageHighlighterColors.STRING || key == SyntaxHighlighterColors.STRING) {
         return true;
       }
+      if (key == null) continue;
       final TextAttributesKey fallbackAttributeKey = key.getFallbackAttributeKey();
       if (fallbackAttributeKey != null && isHighlightedAsString(fallbackAttributeKey)) {
         return true;