diff --git a/src/testsuites/bench.c b/src/testsuites/bench.c
index 8ca770c..60070fc 100644
--- a/src/testsuites/bench.c
+++ b/src/testsuites/bench.c
@@ -1,4 +1,7 @@
+#ifndef CU_ENABLE_TIMER
 #define CU_ENABLE_TIMER
+#endif
+
 #include <cu/cu.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/src/testsuites/bench2.c b/src/testsuites/bench2.c
index 465acf3..de81aab 100644
--- a/src/testsuites/bench2.c
+++ b/src/testsuites/bench2.c
@@ -1,4 +1,7 @@
+#ifndef CU_ENABLE_TIMER
 #define CU_ENABLE_TIMER
+#endif
+
 #include <cu/cu.h>
 #include <stdio.h>
 #include <stdlib.h>