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-rw-r--r--sys/src/libmp/port/mplogic.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/src/libmp/port/mplogic.c b/sys/src/libmp/port/mplogic.c
index 16de7571b..a3258e45b 100644
--- a/sys/src/libmp/port/mplogic.c
+++ b/sys/src/libmp/port/mplogic.c
@@ -141,7 +141,7 @@ mptrunc(mpint *b, int n, mpint *r)
m = n % Dbits;
if(b->sign == -1){
c = 1;
- for(i = 0; i <= r->top; i++){
+ for(i = 0; i < r->top; i++){
if(i < b->top)
r->p[i] = ~(b->p[i] - c);
else