diff --git a/pythoncapi_compat.h b/pythoncapi_compat.h
index 791d511..6a7037e 100644
--- a/pythoncapi_compat.h
+++ b/pythoncapi_compat.h
@@ -2531,7 +2531,7 @@ PyBytesWriter_WriteBytes(PyBytesWriter *writer,
 
 static inline int
 PyBytesWriter_Format(PyBytesWriter *writer, const char *format, ...)
-                     Py_GCC_ATTRIBUTE((format(printf, 2, 0)));
+                     Py_GCC_ATTRIBUTE((format(printf, 2, 3)));
 
 static inline int
 PyBytesWriter_Format(PyBytesWriter *writer, const char *format, ...)