diff --git a/src/rtklib.h b/src/rtklib.h
index 935f2c46e..302533813 100644
--- a/src/rtklib.h
+++ b/src/rtklib.h
@@ -222,7 +222,7 @@ extern "C" {
 #define MAXSTRRTK   8                   /* max number of stream in RTK server */
 #define MAXSBSMSG   32                  /* max number of SBAS msg in RTK server */
 #define MAXSOLMSG   4096                /* max length of solution message */
-#define MAXRAWLEN   4096                /* max length of receiver raw message */
+#define MAXRAWLEN   8192                /* max length of receiver raw message */
 #define MAXERRMSG   4096                /* max length of error/warning message */
 #define MAXANT      64                  /* max length of station name/antenna type */
 #define MAXSOLBUF   256                 /* max number of solution buffer */