diff --git a/python/py3compat.h b/python/py3compat.h
index 775d55bbd7e..423b4be6471 100644
--- a/python/py3compat.h
+++ b/python/py3compat.h
@@ -61,7 +61,6 @@
 #define PyStr_FromFormat PyUnicode_FromFormat
 #define PyStr_FromFormatV PyUnicode_FromFormatV
 #define PyStr_AsString PyUnicode_AsUTF8
-#define PyStr_InternInPlace PyUnicode_InternInPlace
 #define PyStr_InternFromString PyUnicode_InternFromString
 #define PyStr_Decode PyUnicode_Decode