diff -Nrup a/addition_scs.c b/addition_scs.c
--- a/addition_scs.c	2003-05-28 09:27:13.000000000 -0600
+++ b/addition_scs.c	2019-10-15 14:40:42.696340419 -0600
@@ -252,7 +252,7 @@ void inline scs_add_no_renorm(scs_ptr re
    non-zero. 
  */
 
-void inline do_add(scs_ptr result, scs_ptr x, scs_ptr y)
+static void inline do_add(scs_ptr result, scs_ptr x, scs_ptr y)
 {
 #if (SCS_NB_WORDS==8)  /* in this case we unroll all the loops */
   int carry, Diff;
@@ -422,7 +422,7 @@ int inline scs_cmp_mant(scs_ptr x, scs_p
 */
 
 
-void inline do_sub(scs_ptr result, scs_ptr x, scs_ptr y){
+static void inline do_sub(scs_ptr result, scs_ptr x, scs_ptr y){
   int s, carry;
   int Diff, i, j, cp;
   int res[SCS_NB_WORDS];