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-rw-r--r--gmp-impl.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/gmp-impl.h b/gmp-impl.h
index 0ab21c04e..db330effc 100644
--- a/gmp-impl.h
+++ b/gmp-impl.h
@@ -1466,7 +1466,7 @@ __GMP_DECLSPEC void mpn_invert (mp_ptr, mp_srcptr, mp_size_t, mp_ptr);
__GMP_DECLSPEC mp_limb_t mpn_ni_invertappr (mp_ptr, mp_srcptr, mp_size_t, mp_ptr);
#define mpn_invertappr __MPN(invertappr)
__GMP_DECLSPEC mp_limb_t mpn_invertappr (mp_ptr, mp_srcptr, mp_size_t, mp_ptr);
-#define mpn_invertappr_itch(n) (2 * (n) + 4)
+#define mpn_invertappr_itch(n) (2 * (n))
#define mpn_binvert __MPN(binvert)
__GMP_DECLSPEC void mpn_binvert (mp_ptr, mp_srcptr, mp_size_t, mp_ptr);