diff --git a/Makefile b/Makefile
index 862f713..6e5b675 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
-PREFIX=/usr/local
+PREFIX?=/usr/local
 INC=-I$(PREFIX)/include
-LIB=-L$(PREFIX)/lib  -lutil
-FLAGS=-Wall -O2 -pipe -funroll-loops -ffast-math -fno-strict-aliasing -mssse3
+LIB=-L$(PREFIX)/lib  -lpidutil
+FLAGS=-Wall -Wextra -O2 -pipe -funroll-loops -ffast-math -fno-strict-aliasing -mssse3
 CC?=cc
 
 all: ifstatd_
diff --git a/ifstatd.c b/ifstatd.c
index 1ccaef9..24d6bd0 100644
--- a/ifstatd.c
+++ b/ifstatd.c
@@ -46,7 +46,13 @@
 #include <string.h>
 #include <sysexits.h>
 #include <unistd.h>
-#include <libutil.h>
+#include <time.h>
+#include <pidutil.h>
+
+#ifdef __MACH__
+#include <sys/time.h>
+#define CLOCK_REALTIME 0
+#endif
 
 #define IFA_STAT(s)     (((struct if_data *)ifa->ifa_data)->ifi_ ## s)
 #define RESOLUTION	10
@@ -70,6 +76,23 @@ char   *pid_filename;
 char   *cache_filename;
 struct pidfh *pfh;
 
+#ifdef __MACH__
+/* clock_gettime is not implemented on OSX */
+int 
+clock_gettime(int clk_id, struct timespec *t)
+{
+	struct timeval now;
+	int rv = gettimeofday(&now, NULL);
+
+	if (rv)
+		return rv;
+	t->tv_sec = now.tv_sec;
+	t->tv_nsec = now.tv_usec * 1000;
+	return 0;
+}
+
+#endif
+
 /*
  * Prepare for a clean shutdown
  */