diff --git a/utils.c b/utils.c
index 03691c0..23ee768 100644
--- a/utils.c
+++ b/utils.c
@@ -238,6 +238,8 @@ static inline int fdatasync(int fd)
 /* This function is a _rough_ approximation of posix_fadvise(2). */
 int posix_fadvise(int fd, off_t offset, off_t len, int advice)
 {
+	UNUSED(offset);
+	UNUSED(len);
 	switch (advice) {
 	case POSIX_FADV_SEQUENTIAL:
 		return fcntl(fd, F_RDAHEAD, 1);
diff --git a/utils.h b/utils.h
index 8ce8e9a..6b7c92f 100644
--- a/utils.h
+++ b/utils.h
@@ -34,6 +34,8 @@ static inline uint64_t random_number(uint64_t prv_number)
 	return prv_number * 4294967311ULL + 17;
 }
 
+#define UNUSED(x)	((void)x)
+
 #if __APPLE__ && __MACH__
 
 #include <unistd.h>	/* For type off_t.	*/