diff --git a/gdbstub.c b/gdbstub.c
index 452b7d0ecd..8967276f3f 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -1602,8 +1602,6 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
     return RS_IDLE;
 }
 
-extern void tb_flush(CPUState *env);
-
 void gdb_set_stop_cpu(CPUState *env)
 {
     gdbserver_state->c_cpu = env;
diff --git a/hw/virtio.c b/hw/virtio.c
index bfa6a40ac8..24a4b26718 100644
--- a/hw/virtio.c
+++ b/hw/virtio.c
@@ -485,7 +485,7 @@ static void virtio_update_irq(VirtIODevice *vdev)
     qemu_set_irq(vdev->pci_dev.irq[0], vdev->isr & 1);
 }
 
-void virtio_reset(void *opaque)
+static void virtio_reset(void *opaque)
 {
     VirtIODevice *vdev = opaque;
     int i;
diff --git a/net.c b/net.c
index 10d23b41f6..cbf1cdf35c 100644
--- a/net.c
+++ b/net.c
@@ -284,8 +284,8 @@ int parse_host_port(struct sockaddr_in *saddr, const char *str)
     return 0;
 }
 
-#ifndef _WIN32
-int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
+#if !defined(_WIN32) && 0
+static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
 {
     const char *p;
     int len;
diff --git a/vl.c b/vl.c
index 00adb79978..c6d888ce4d 100644
--- a/vl.c
+++ b/vl.c
@@ -3526,7 +3526,7 @@ void qemu_system_powerdown_request(void)
 }
 
 #ifdef _WIN32
-void host_main_loop_wait(int *timeout)
+static void host_main_loop_wait(int *timeout)
 {
     int ret, ret2, i;
     PollingEntry *pe;
@@ -3570,7 +3570,7 @@ void host_main_loop_wait(int *timeout)
     *timeout = 0;
 }
 #else
-void host_main_loop_wait(int *timeout)
+static void host_main_loop_wait(int *timeout)
 {
 }
 #endif