diff --git a/python/psi-api/src/com/jetbrains/python/psi/impl/PyPsiUtils.java b/python/psi-api/src/com/jetbrains/python/psi/impl/PyPsiUtils.java
index 34981829d251..1ff9777b7684 100644
--- a/python/psi-api/src/com/jetbrains/python/psi/impl/PyPsiUtils.java
+++ b/python/psi-api/src/com/jetbrains/python/psi/impl/PyPsiUtils.java
@@ -216,7 +216,9 @@ public class PyPsiUtils {
       toDelete.add(prev);
       prev = prev.getTreeNext();
     }
-    statement.deleteChildRange(toDelete.get(0).getPsi(), toDelete.get(toDelete.size() - 1).getPsi());
+    if (toDelete.size() > 0) {
+      statement.deleteChildRange(toDelete.get(0).getPsi(), toDelete.get(toDelete.size() - 1).getPsi());
+    }
   }
 
   static <T, U extends PsiElement> List<T> collectStubChildren(U e,