diff --git a/src/rtklib.h b/src/rtklib.h
index f57f14510512b5986ff84163f4f8f33ec14a4eb4..688df5483044b49ba5858c1da53bdffb347b14c2 100644
--- a/src/rtklib.h
+++ b/src/rtklib.h
@@ -58,7 +58,7 @@ extern "C" {
 
 #define VER_RTKLIB  "2.4.3 demo5"             /* library version */
 
-#define PATCH_LEVEL "b29a"               /* patch level */
+#define PATCH_LEVEL "b29b"               /* patch level */
 
 #define COPYRIGHT_RTKLIB \
             "Copyright (C) 2007-2017 T.Takasu\nAll rights reserved."