diff --git a/src/lat_sig.c b/src/lat_sig.c
index 5913c48..96d3f20 100644
--- a/src/lat_sig.c
+++ b/src/lat_sig.c
@@ -20,7 +20,7 @@ char	*id = "$Id$\n";
 
 uint64	caught, n;
 double	adj;
-void	handler(int) { }
+void	handler(__attribute__((unused)) int unused) { }
 jmp_buf	prot_env;
 
 void
@@ -69,7 +69,7 @@ struct _state {
 };
 
 void
-prot(int) {
+prot(__attribute__((unused)) int unused) {
 	if (++caught == n) {
 		caught = 0;
 		n = benchmp_interval(benchmp_getstate());
diff --git a/src/lat_usleep.c b/src/lat_usleep.c
index 842ad06..0e17a46 100755
--- a/src/lat_usleep.c
+++ b/src/lat_usleep.c
@@ -99,7 +99,7 @@ bench_pselect(iter_t iterations, void *cookie)
 #endif /* _POSIX_SELECT */
 
 void
-interval(int)
+interval(__attribute__((unused)) int unused)
 {
     if (++caught == n) {
 	caught = 0;
diff --git a/src/memsize.c b/src/memsize.c
index 902132a..3be8a7a 100644
--- a/src/memsize.c
+++ b/src/memsize.c
@@ -151,7 +151,7 @@ test_malloc(size_t size)
 }
 
 void
-gotalarm(int)
+gotalarm(__attribute__((unused)) int unused)
 {
 	alarm_triggered = 1;
 }