diff --git a/python/src/com/jetbrains/python/documentation/docstrings/PyStructuredDocstringFormatter.java b/python/src/com/jetbrains/python/documentation/docstrings/PyStructuredDocstringFormatter.java
index 701cfba49aab..25293cc09f68 100644
--- a/python/src/com/jetbrains/python/documentation/docstrings/PyStructuredDocstringFormatter.java
+++ b/python/src/com/jetbrains/python/documentation/docstrings/PyStructuredDocstringFormatter.java
@@ -144,6 +144,7 @@ public class PyStructuredDocstringFormatter {
     
     final ProcessOutput output = PySdkUtil.getProcessOutput(commandLine, new File(sdkHome).getParent(), env, 5000, data, false);
     if (!output.checkSuccess(LOG)) {
+      LOG.info("Malformed docstring:\n" + docstring);
       return null;
     }
     return output.getStdout();