diff --git a/3party/robust/predicates.c b/3party/robust/predicates.c
index ba0759d96b..5f9a5c2328 100644
--- a/3party/robust/predicates.c
+++ b/3party/robust/predicates.c
@@ -116,7 +116,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <sys/time.h>
+#include <time.h>
 
 /* On some machines, the exact arithmetic routines might be defeated by the  */
 /*   use of internal extended precision floating-point registers.  Sometimes */
@@ -500,9 +500,9 @@ double doublerand()
   long a, b, c;
   long i;
 
-  a = random();
-  b = random();
-  c = random();
+  a = rand();
+  b = rand();
+  c = rand();
   result = (double) (a - 1073741824) * 8388608.0 + (double) (b >> 8);
   for (i = 512, expo = 2; i <= 131072; i *= 2, expo = expo * expo) {
     if (c & i) {
@@ -526,9 +526,9 @@ double narrowdoublerand()
   long a, b, c;
   long i;
 
-  a = random();
-  b = random();
-  c = random();
+  a = rand();
+  b = rand();
+  c = rand();
   result = (double) (a - 1073741824) * 8388608.0 + (double) (b >> 8);
   for (i = 512, expo = 2; i <= 2048; i *= 2, expo = expo * expo) {
     if (c & i) {
@@ -549,8 +549,8 @@ double uniformdoublerand()
   double result;
   long a, b;
 
-  a = random();
-  b = random();
+  a = rand();
+  b = rand();
   result = (double) (a - 1073741824) * 8388608.0 + (double) (b >> 8);
   return result;
 }
@@ -569,8 +569,8 @@ float floatrand()
   long a, c;
   long i;
 
-  a = random();
-  c = random();
+  a = rand();
+  c = rand();
   result = (float) ((a - 1073741824) >> 6);
   for (i = 512, expo = 2; i <= 16384; i *= 2, expo = expo * expo) {
     if (c & i) {
@@ -594,8 +594,8 @@ float narrowfloatrand()
   long a, c;
   long i;
 
-  a = random();
-  c = random();
+  a = rand();
+  c = rand();
   result = (float) ((a - 1073741824) >> 6);
   for (i = 512, expo = 2; i <= 2048; i *= 2, expo = expo * expo) {
     if (c & i) {
@@ -616,7 +616,7 @@ float uniformfloatrand()
   float result;
   long a;
 
-  a = random();
+  a = rand();
   result = (float) ((a - 1073741824) >> 6);
   return result;
 }
diff --git a/geometry/robust_orientation.cpp b/geometry/robust_orientation.cpp
index dc806ec1ce..3bfa4b2a9c 100644
--- a/geometry/robust_orientation.cpp
+++ b/geometry/robust_orientation.cpp
@@ -2,7 +2,10 @@
 
 #include "robust_orientation.hpp"
 
-#include "../3party/robust/predicates.c"
+extern "C"
+{
+  #include "../3party/robust/predicates.c"
+}
 
 #include "../base/start_mem_debug.hpp"