diff --git a/java/structuralsearch-java/src/com/intellij/structuralsearch/JavaStructuralSearchProfile.java b/java/structuralsearch-java/src/com/intellij/structuralsearch/JavaStructuralSearchProfile.java
index e25de3bc9e94..cb4271ce398a 100644
--- a/java/structuralsearch-java/src/com/intellij/structuralsearch/JavaStructuralSearchProfile.java
+++ b/java/structuralsearch-java/src/com/intellij/structuralsearch/JavaStructuralSearchProfile.java
@@ -761,7 +761,7 @@ public class JavaStructuralSearchProfile extends StructuralSearchProfile {
   }
 
   @Override
-  public boolean isIdentifier(PsiElement element) {
+  public boolean isIdentifier(@Nullable PsiElement element) {
     return element instanceof PsiIdentifier;
   }
 
diff --git a/platform/structuralsearch/source/com/intellij/structuralsearch/StructuralSearchProfile.java b/platform/structuralsearch/source/com/intellij/structuralsearch/StructuralSearchProfile.java
index 90d4f5fdf49f..bf3411243de9 100644
--- a/platform/structuralsearch/source/com/intellij/structuralsearch/StructuralSearchProfile.java
+++ b/platform/structuralsearch/source/com/intellij/structuralsearch/StructuralSearchProfile.java
@@ -263,7 +263,7 @@ public abstract class StructuralSearchProfile {
   }
 
   @Contract("null -> false")
-  public boolean isIdentifier(PsiElement element) {
+  public boolean isIdentifier(@Nullable PsiElement element) {
     return false;
   }
 
diff --git a/platform/structuralsearch/source/com/intellij/structuralsearch/XmlStructuralSearchProfile.java b/platform/structuralsearch/source/com/intellij/structuralsearch/XmlStructuralSearchProfile.java
index e85c4b0b1d5a..8c5e6106474b 100644
--- a/platform/structuralsearch/source/com/intellij/structuralsearch/XmlStructuralSearchProfile.java
+++ b/platform/structuralsearch/source/com/intellij/structuralsearch/XmlStructuralSearchProfile.java
@@ -47,7 +47,7 @@ public class XmlStructuralSearchProfile extends StructuralSearchProfile {
   }
 
   @Override
-  public boolean isIdentifier(PsiElement element) {
+  public boolean isIdentifier(@Nullable PsiElement element) {
     return element instanceof XmlToken && ((XmlToken)element).getTokenType() == XmlTokenType.XML_NAME;
   }
 
diff --git a/plugins/groovy/structuralsearch-groovy/src/com/intellij/structuralsearch/GroovyStructuralSearchProfile.java b/plugins/groovy/structuralsearch-groovy/src/com/intellij/structuralsearch/GroovyStructuralSearchProfile.java
index 341cbe9a7227..b75b3205b23f 100644
--- a/plugins/groovy/structuralsearch-groovy/src/com/intellij/structuralsearch/GroovyStructuralSearchProfile.java
+++ b/plugins/groovy/structuralsearch-groovy/src/com/intellij/structuralsearch/GroovyStructuralSearchProfile.java
@@ -68,7 +68,7 @@ public class GroovyStructuralSearchProfile extends StructuralSearchProfileBase {
   }
 
   @Override
-  public boolean isIdentifier(PsiElement element) {
+  public boolean isIdentifier(@Nullable PsiElement element) {
     return element instanceof PsiIdentifier;
   }
 }