diff --git a/perf_counter.c b/perf_counter.c
index 1136930..1f59275 100644
--- a/perf_counter.c
+++ b/perf_counter.c
@@ -181,7 +181,6 @@ volatile static int32_t s_nSystemUS = 0;
 volatile static int64_t s_lSystemClockCounts = 0;
 
 /*============================ PROTOTYPES ====================================*/
-
 /*============================ IMPLEMENTATION ================================*/
 /*============================ INCLUDES ======================================*/
 
diff --git a/perf_counter.h b/perf_counter.h
index 51469b1..f13f926 100644
--- a/perf_counter.h
+++ b/perf_counter.h
@@ -134,6 +134,14 @@ extern "C" {
 #   define UNUSED_PARAM(__VAR)     (void)(__VAR)
 #endif
 
+#ifndef MIN
+#   define MIN(__a, __b)  ((__a) <= (__b) ? (__a) : (__b))
+#endif
+
+#ifndef MAX
+#   define MAX(__a, __b)  ((__a) >= (__b) ? (__a) : (__b))
+#endif
+
 /*!
  * \brief an attribute for static variables that no initialisation is required 
  *        in the C startup process.