2 files changed, 8 insertions, 5 deletions

diff --git a/timer/include/timer.h b/timer/include/timer.h
index a8a3f8b..b65f8d4 100644
--- a/timer/include/timer.h
+++ b/timer/include/timer.h
@@ -6,6 +6,10 @@
 #ifdef _WIN32
 typedef uint64_t time_point;
 #else
+// Need to macro to make CLOCK_REALTIME available when compiling with ISO C11.
+// The constant is only needed in the source file, but the header file needs to
+// include time.h too.
+#define __USE_POSIX199309
 #include <time.h>
 typedef struct timespec time_point;
 #endif
diff --git a/timer/src/timer.c b/timer/src/timer.c
index 0c33e51..da3485b 100644
--- a/timer/src/timer.c
+++ b/timer/src/timer.c
@@ -1,16 +1,15 @@
 #include "timer.h"
 
 #include <stdlib.h>
-
 #ifdef _WIN32
-static const int64_t microseconds = 1000000;
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
 #endif
-static const int64_t nanoseconds = 1000000000;
 
 #ifdef _WIN32
-#define WIN32_LEAN_AND_MEAN
-#include <Windows.h>
+static const int64_t microseconds = 1000000;
 #endif
+static const int64_t nanoseconds = 1000000000;
 
 #ifdef _WIN32
 static double seconds_per_count;