diff --git a/lib/hcrypto/libtommath/demo/demo.c b/lib/hcrypto/libtommath/demo/demo.c
index e1b2eb238..2442611f9 100644
--- a/lib/hcrypto/libtommath/demo/demo.c
+++ b/lib/hcrypto/libtommath/demo/demo.c
@@ -83,7 +83,7 @@ int main(void)
 
          // now test a random reduction
          for (ix = 0; ix < 100; ix++) {
-             mp_rand(&c, 1 + labs(rand()) % (2*i));
+             mp_rand(&c, 1 + abs(rand()) % (2*i));
              mp_copy(&c, &d);
              mp_copy(&c, &e);
 
@@ -286,7 +286,7 @@ printf("compare no compare!\n"); exit(EXIT_FAILURE); }
 
       if (!(++cnt & 127))
 	 printf("%9d\r", cnt);
-      mp_rand(&a, labs(rand()) % 128 + 1);
+      mp_rand(&a, abs(rand()) % 128 + 1);
       mp_div(&a, &d, &b, &e);
       mp_div_3(&a, &c, &r2);
 
@@ -394,7 +394,7 @@ printf("compare no compare!\n"); exit(EXIT_FAILURE); }
 
    for (;;) {
       /* randomly clear and re-init one variable, this has the affect of triming the alloc space */
-      switch (labs(rand()) % 7) {
+      switch (abs(rand()) % 7) {
       case 0:
 	 mp_clear(&a);
 	 mp_init(&a);
diff --git a/lib/hcrypto/libtommath/etc/pprime.c b/lib/hcrypto/libtommath/etc/pprime.c
index bc9f87403..317e2a0fc 100644
--- a/lib/hcrypto/libtommath/etc/pprime.c
+++ b/lib/hcrypto/libtommath/etc/pprime.c
@@ -163,7 +163,7 @@ mp_digit prime_digit(void)
    int n;
    mp_digit d;
 
-   n = labs(rand()) % n_prime;
+   n = abs(rand()) % n_prime;
    fseek(primes, n * sizeof(mp_digit), SEEK_SET);
    fread(&d, 1, sizeof(mp_digit), primes);
    return d;
diff --git a/lib/hcrypto/libtommath/mtest/mtest.c b/lib/hcrypto/libtommath/mtest/mtest.c
index 6053f7b52..bdfe6127a 100644
--- a/lib/hcrypto/libtommath/mtest/mtest.c
+++ b/lib/hcrypto/libtommath/mtest/mtest.c
@@ -281,7 +281,7 @@ int main(void)
       printf("%s\n", buf);
    } else if (n == 13) {
       rand_num2(&a);
-      tmp = labs(rand()) & THE_MASK;
+      tmp = abs(rand()) & THE_MASK;
       mp_add_d(&a, tmp, &b);
       printf("add_d\n");
       mp_to64(&a, buf);
@@ -290,7 +290,7 @@ int main(void)
       printf("%s\n", buf);
    } else if (n == 14) {
       rand_num2(&a);
-      tmp = labs(rand()) & THE_MASK;
+      tmp = abs(rand()) & THE_MASK;
       mp_sub_d(&a, tmp, &b);
       printf("sub_d\n");
       mp_to64(&a, buf);
diff --git a/lib/hcrypto/libtommath/tommath.src b/lib/hcrypto/libtommath/tommath.src
index 2e058056e..40658222c 100644
--- a/lib/hcrypto/libtommath/tommath.src
+++ b/lib/hcrypto/libtommath/tommath.src
@@ -19,7 +19,7 @@
 \def\gcd{{\rm gcd}}
 \def\log{{\rm log}}
 \def\ord{{\rm ord}}
-\def\labs{{\mathit labs}}
+\def\abs{{\mathit abs}}
 \def\rep{{\mathit rep}}
 \def\mod{{\mathit\ mod\ }}
 \renewcommand{\pmod}[1]{\ ({\rm mod\ }{#1})}
diff --git a/lib/hcrypto/libtommath/tommath.tex b/lib/hcrypto/libtommath/tommath.tex
index 020c2e50c..17d6041d5 100644
--- a/lib/hcrypto/libtommath/tommath.tex
+++ b/lib/hcrypto/libtommath/tommath.tex
@@ -20,6 +20,7 @@
 \def\log{{\rm log}}
 \def\ord{{\rm ord}}
 \def\labs{{\mathit labs}}
+\def\abs{{\mathit abs}}
 \def\rep{{\mathit rep}}
 \def\mod{{\mathit\ mod\ }}
 \renewcommand{\pmod}[1]{\ ({\rm mod\ }{#1})}