diff --git a/src/random_seed.c b/src/random_seed.c
index be9db0d..1255938 100644
--- a/src/random_seed.c
+++ b/src/random_seed.c
@@ -4,8 +4,11 @@
 uint32_t mt_generate_random_seed(void) {
 	uint32_t seed = (uint32_t) time(NULL);
 
-#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
+#if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)) || defined(SYS_LINUX)
 	struct timespec ts;
+#endif
+
+#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
 	clock_gettime(CLOCK_REALTIME, &ts);
 	seed ^= (uint32_t) ts.tv_nsec;
 #endif
@@ -27,7 +30,6 @@ uint32_t mt_generate_random_seed(void) {
 	sysctlbyname("kern.boottime", &uptime_usec, &len, NULL, 0);
 	seed ^= (uint32_t) ((uptime_usec / 1000) & 0xFFFFFFFF);
 #elif defined(SYS_LINUX)
-	struct timespec ts;
 	clock_gettime(CLOCK_BOOTTIME, &ts);
 	seed ^= (uint32_t) ((ts.tv_sec * 1000 + ts.tv_nsec / 1000000) & 0xFFFFFFFF);
 #endif