diff --git a/python/src/com/jetbrains/python/psi/impl/stubs/PyClassElementType.java b/python/src/com/jetbrains/python/psi/impl/stubs/PyClassElementType.java
index cd876ac0009d..31425338bf76 100644
--- a/python/src/com/jetbrains/python/psi/impl/stubs/PyClassElementType.java
+++ b/python/src/com/jetbrains/python/psi/impl/stubs/PyClassElementType.java
@@ -74,10 +74,10 @@ public class PyClassElementType extends PyStubElementType<PyClassStub, PyClass>
   public void indexStub(final PyClassStub stub, final IndexSink sink) {
     final String name = stub.getName();
     if (name != null) {
-      sink.occurence(PyClassNameIndex.KEY, name);
+      sink.occurrence(PyClassNameIndex.KEY, name);
     }
     for(String s: stub.getSuperClasses()) {
-      sink.occurence(PySuperClassIndex.KEY, s);
+      sink.occurrence(PySuperClassIndex.KEY, s);
     }
   }
 }
\ No newline at end of file
diff --git a/python/src/com/jetbrains/python/psi/impl/stubs/PyFunctionElementType.java b/python/src/com/jetbrains/python/psi/impl/stubs/PyFunctionElementType.java
index cadc9e8b3ad8..f2c1c72ef5a2 100644
--- a/python/src/com/jetbrains/python/psi/impl/stubs/PyFunctionElementType.java
+++ b/python/src/com/jetbrains/python/psi/impl/stubs/PyFunctionElementType.java
@@ -50,7 +50,7 @@ public class PyFunctionElementType extends PyStubElementType<PyFunctionStub, PyF
   public void indexStub(final PyFunctionStub stub, final IndexSink sink) {
     final String name = stub.getName();
     if (name != null) {
-      sink.occurence(PyFunctionNameIndex.KEY, name);
+      sink.occurrence(PyFunctionNameIndex.KEY, name);
     }
   }
 }
\ No newline at end of file