diff --git a/Misc/NEWS b/Misc/NEWS
index f7a18c0b2c5..0a328bde66c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -15,6 +15,9 @@ Core and Builtins
 - Issue #3642: Changed type of numarenas from uint to size_t
   in order to silence a compilier warning on 64bit OSes.
 
+- Silenced another compiler warning about a used but not defined
+  function 'stringlib_contains_obj'.
+
 Library
 -------
 
diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
index 5ba1f6d8e52..c4fc37f070e 100644
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -1098,6 +1098,7 @@ bytes_dealloc(PyByteArrayObject *self)
 #define STRINGLIB_EMPTY nullbytes
 #define STRINGLIB_CHECK_EXACT PyByteArray_CheckExact
 #define STRINGLIB_MUTABLE 1
+#define FROM_BYTEARRAY 1
 
 #include "stringlib/fastsearch.h"
 #include "stringlib/count.h"
diff --git a/Objects/stringlib/find.h b/Objects/stringlib/find.h
index 5b17c7fb079..9e0d2998452 100644
--- a/Objects/stringlib/find.h
+++ b/Objects/stringlib/find.h
@@ -90,7 +90,7 @@ stringlib_rfind_slice(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
     return stringlib_rfind(str + start, end - start, sub, sub_len, start);
 }
 
-#ifdef STRINGLIB_STR
+#if defined(STRINGLIB_STR) && !defined(FROM_BYTEARRAY)
 
 Py_LOCAL_INLINE(int)
 stringlib_contains_obj(PyObject* str, PyObject* sub)