diff --git a/[refs] b/[refs]
index d901c3536a51..a0056f03263f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 637241a900cbd982f744d44646b48a273d609b34
+refs/heads/master: 5402b8047b0d286b6501f9097891cbf1e06daa3a
diff --git a/trunk/lib/mpi/mpicoder.c b/trunk/lib/mpi/mpicoder.c
index 5f9c44cdf1f5..4cc6442733f4 100644
--- a/trunk/lib/mpi/mpicoder.c
+++ b/trunk/lib/mpi/mpicoder.c
@@ -37,7 +37,7 @@ MPI mpi_read_raw_data(const void *xbuffer, size_t nbytes)
 	mpi_limb_t a;
 	MPI val = NULL;
 
-	while (nbytes >= 0 && buffer[0] == 0) {
+	while (nbytes > 0 && buffer[0] == 0) {
 		buffer++;
 		nbytes--;
 	}