diff --git a/Include/patchlevel.h b/Include/patchlevel.h
index 4f58762..e5bac22 100644
--- a/Include/patchlevel.h
+++ b/Include/patchlevel.h
@@ -22,11 +22,11 @@
 #define PY_MAJOR_VERSION	2
 #define PY_MINOR_VERSION	5
 #define PY_MICRO_VERSION	0
-#define PY_RELEASE_LEVEL	PY_RELEASE_LEVEL_ALPHA
-#define PY_RELEASE_SERIAL	2
+#define PY_RELEASE_LEVEL	PY_RELEASE_LEVEL_BETA
+#define PY_RELEASE_SERIAL	1
 
 /* Version as a string */
-#define PY_VERSION		"2.5a2"
+#define PY_VERSION		"2.5b1"
 
 /* Subversion Revision number of this file (not of the repository) */
 #define PY_PATCHLEVEL_REVISION  "$Revision$"