diff --git a/src/utl/test.h b/src/utl/test.h
index 5b4cd93..f25fd6a 100644
--- a/src/utl/test.h
+++ b/src/utl/test.h
@@ -108,12 +108,12 @@ static void cmc_test_log(const char *unit_name, const char *current_test, bool a
         tinfo.verbose = VERBOSE;                                                            \
                                                                                             \
         /* Tests */                                                                         \
-        timer_start(timer);                                                                 \
+        cmc_timer_start(timer);                                                             \
                                                                                             \
         BODY;                                                                               \
                                                                                             \
-        timer_stop(timer);                                                                  \
-        timer_calc(timer);                                                                  \
+        cmc_timer_stop(timer);                                                              \
+        cmc_timer_calc(timer);                                                              \
                                                                                             \
     unittest_abort:                                                                         \
         if (tinfo.aborted)                                                                  \
diff --git a/src/utl/timer.h b/src/utl/timer.h
index b3b77f3..eb6db99 100644
--- a/src/utl/timer.h
+++ b/src/utl/timer.h
@@ -22,7 +22,7 @@ typedef struct cmc_timer_s
     double result;
 } cmc_timer;
 
-#define timer_start(timer)       \
+#define cmc_timer_start(timer)   \
     do                           \
     {                            \
         cmc_timer *t = &(timer); \
@@ -30,15 +30,15 @@ typedef struct cmc_timer_s
                                  \
     } while (0)
 
-#define timer_stop(timer)       \
-    do                          \
-    {                           \
-        cmc_timer *t = &(timer);\
-        t->stop = clock();      \
-                                \
+#define cmc_timer_stop(timer)    \
+    do                           \
+    {                            \
+        cmc_timer *t = &(timer); \
+        t->stop = clock();       \
+                                 \
     } while (0)
 
-#define timer_calc(timer)                                                   \
+#define cmc_timer_calc(timer)                                               \
     do                                                                      \
     {                                                                       \
         cmc_timer *t = &(timer);                                            \