diff --git a/library/bignum.c b/library/bignum.c
index eccb9d3..b221312 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -687,7 +687,7 @@
         return( 0 );
 
     if( i > j ) return(  X->s );
-    if( j > i ) return( -X->s );
+    if( j > i ) return( -Y->s );
 
     if( X->s > 0 && Y->s < 0 ) return(  1 );
     if( Y->s > 0 && X->s < 0 ) return( -1 );