diff --git a/cpus.c b/cpus.c
index 077729c..b6e658d 100644
--- a/cpus.c
+++ b/cpus.c
@@ -278,7 +278,7 @@
 
 static void qemu_event_read(void *opaque)
 {
-    int fd = (unsigned long)opaque;
+    int fd = (intptr_t)opaque;
     ssize_t len;
     char buffer[512];
 
@@ -306,7 +306,7 @@
         goto fail;
     }
     qemu_set_fd_handler2(fds[0], NULL, qemu_event_read, NULL,
-                         (void *)(unsigned long)fds[0]);
+                         (void *)(intptr_t)fds[0]);
 
     io_thread_fd = fds[1];
     return 0;
@@ -327,7 +327,7 @@
  */
 static void sigfd_handler(void *opaque)
 {
-    int fd = (unsigned long) opaque;
+    int fd = (intptr_t)opaque;
     struct qemu_signalfd_siginfo info;
     struct sigaction action;
     ssize_t len;
@@ -395,7 +395,7 @@
     fcntl_setfl(sigfd, O_NONBLOCK);
 
     qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL,
-                         (void *)(unsigned long) sigfd);
+                         (void *)(intptr_t)sigfd);
 
     return 0;
 }
diff --git a/migration-tcp.c b/migration-tcp.c
index b55f419..e8dff9d 100644
--- a/migration-tcp.c
+++ b/migration-tcp.c
@@ -139,7 +139,7 @@
 {
     struct sockaddr_in addr;
     socklen_t addrlen = sizeof(addr);
-    int s = (unsigned long)opaque;
+    int s = (intptr_t)opaque;
     QEMUFile *f;
     int c;
 
@@ -194,7 +194,7 @@
         goto err;
 
     qemu_set_fd_handler2(s, NULL, tcp_accept_incoming_migration, NULL,
-                         (void *)(unsigned long)s);
+                         (void *)(intptr_t)s);
 
     return 0;
 
diff --git a/migration-unix.c b/migration-unix.c
index 57232c0..8b967f2 100644
--- a/migration-unix.c
+++ b/migration-unix.c
@@ -147,7 +147,7 @@
 {
     struct sockaddr_un addr;
     socklen_t addrlen = sizeof(addr);
-    int s = (unsigned long)opaque;
+    int s = (intptr_t)opaque;
     QEMUFile *f;
     int c;
 
@@ -204,7 +204,7 @@
     }
 
     qemu_set_fd_handler2(sock, NULL, unix_accept_incoming_migration, NULL,
-			 (void *)(unsigned long)sock);
+			 (void *)(intptr_t)sock);
 
     return 0;
 
diff --git a/qemu-char.c b/qemu-char.c
index bd4e944..cad35d7 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -1376,7 +1376,7 @@
 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
 {
-    int fd = (int)(long)chr->opaque;
+    int fd = (int)(intptr_t)chr->opaque;
     uint8_t b;
 
     switch(cmd) {
@@ -1422,7 +1422,7 @@
         return NULL;
 
     chr = qemu_mallocz(sizeof(CharDriverState));
-    chr->opaque = (void *)(long)fd;
+    chr->opaque = (void *)(intptr_t)fd;
     chr->chr_write = null_chr_write;
     chr->chr_ioctl = pp_ioctl;
     return chr;