diff --git a/src/unix/os390.c b/src/unix/os390.c
index eaeb43e6c..127656db8 100644
--- a/src/unix/os390.c
+++ b/src/unix/os390.c
@@ -386,7 +386,6 @@ int uv_uptime(double* uptime) {
 
 int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
   uv_cpu_info_t* cpu_info;
-  int result;
   int idx;
   siv1v2 info;
   data_area_ptr cvt = {0};
diff --git a/src/unix/sunos.c b/src/unix/sunos.c
index 49de5a7fc..a72c26a01 100644
--- a/src/unix/sunos.c
+++ b/src/unix/sunos.c
@@ -757,7 +757,6 @@ int uv_interface_addresses(uv_interface_address_t** addresses, int* count) {
   uv_interface_address_t* address;
   struct ifaddrs* addrs;
   struct ifaddrs* ent;
-  int i;
 
   if (getifaddrs(&addrs))
     return -errno;
diff --git a/src/unix/thread.c b/src/unix/thread.c
index 35d3e77b0..e61b51ed8 100644
--- a/src/unix/thread.c
+++ b/src/unix/thread.c
@@ -404,7 +404,6 @@ int uv_sem_trywait(uv_sem_t* sem) {
 
 int uv_sem_init(uv_sem_t* sem, unsigned int value) {
   uv_sem_t semid;
-  struct sembuf buf;
   int err;
   union {
     int val;