diff --git a/python/src/com/jetbrains/python/editor/PyStripTrailingSpacesFilterFactory.java b/python/src/com/jetbrains/python/editor/PyStripTrailingSpacesFilterFactory.java
index 85bd43f1ccb3..633b5524258e 100644
--- a/python/src/com/jetbrains/python/editor/PyStripTrailingSpacesFilterFactory.java
+++ b/python/src/com/jetbrains/python/editor/PyStripTrailingSpacesFilterFactory.java
@@ -45,6 +45,7 @@ public class PyStripTrailingSpacesFilterFactory extends PsiBasedStripTrailingSpa
       psiFile.accept(new PyRecursiveElementVisitor() {
         @Override
         public void visitPyStringLiteralExpression(PyStringLiteralExpression node) {
+          if (node.isDocString()) return;
           disableRange(node.getTextRange(), false);
         }
       });