diff --git a/lib/mpi/mpi_cmp.c b/lib/mpi/mpi_cmp.c
index 83fa30c..55c547a 100644
--- a/lib/mpi/mpi_cmp.c
+++ b/lib/mpi/mpi_cmp.c
@@ -66,7 +66,6 @@ mpi_cmp_abs(cryb_mpi *X, cryb_mpi *Y)
 int
 mpi_cmp(cryb_mpi *X, cryb_mpi *Y)
 {
-	int i;
 
 	if (X->neg) {
 		if (Y->neg)