diff --git a/library/bignum.c b/library/bignum.c
index 98ee12a..2007662 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -2139,13 +2139,13 @@
 {
     int ret;
     size_t lz, lzt;
-    mbedtls_mpi TG, TA, TB;
+    mbedtls_mpi TA, TB;
 
     MPI_VALIDATE_RET( G != NULL );
     MPI_VALIDATE_RET( A != NULL );
     MPI_VALIDATE_RET( B != NULL );
 
-    mbedtls_mpi_init( &TG ); mbedtls_mpi_init( &TA ); mbedtls_mpi_init( &TB );
+    mbedtls_mpi_init( &TA ); mbedtls_mpi_init( &TB );
 
     MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &TA, A ) );
     MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &TB, B ) );
@@ -2183,7 +2183,7 @@
 
 cleanup:
 
-    mbedtls_mpi_free( &TG ); mbedtls_mpi_free( &TA ); mbedtls_mpi_free( &TB );
+    mbedtls_mpi_free( &TA ); mbedtls_mpi_free( &TB );
 
     return( ret );
 }