diff --git a/Include/patchlevel.h b/Include/patchlevel.h
index 179c9f50214935..6de3e785425120 100644
--- a/Include/patchlevel.h
+++ b/Include/patchlevel.h
@@ -23,7 +23,7 @@
 #define PY_RELEASE_SERIAL       1
 
 /* Version as a string */
-#define PY_VERSION              "3.13.0b1"
+#define PY_VERSION              "3.13.0b1+"
 /*--end constants--*/
 
 /* Version as a single 4-byte hex number, e.g. 0x010502B2 == 1.5.2b2.