diff --git a/[refs] b/[refs]
index f7787d32834d..d0a92f8e3117 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3cccd1543ab623a5065335bf08350e06ffc788ab
+refs/heads/master: e87c5e35a92e045de75fb6ae9846a38bdd0f92bd
diff --git a/trunk/lib/mpi/mpi-pow.c b/trunk/lib/mpi/mpi-pow.c
index b04a3cf80080..67f3e79af914 100644
--- a/trunk/lib/mpi/mpi-pow.c
+++ b/trunk/lib/mpi/mpi-pow.c
@@ -59,7 +59,7 @@ int mpi_powm(MPI res, MPI base, MPI exp, MPI mod)
 	ep = exp->d;
 
 	if (!msize)
-		msize = 1 / msize;	/* provoke a signal */
+		return -EINVAL;
 
 	if (!esize) {
 		/* Exponent is zero, result is 1 mod MOD, i.e., 1 or 0