diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h
index 7da1d63fb0..0f4a0fd4b2 100644
--- a/include/qemu/main-loop.h
+++ b/include/qemu/main-loop.h
@@ -198,10 +198,10 @@ typedef int IOCanReadHandler(void *opaque);
  *
  * @opaque: A pointer-sized value that is passed to @fd_read and @fd_write.
  */
-int qemu_set_fd_handler(int fd,
-                        IOHandler *fd_read,
-                        IOHandler *fd_write,
-                        void *opaque);
+void qemu_set_fd_handler(int fd,
+                         IOHandler *fd_read,
+                         IOHandler *fd_write,
+                         void *opaque);
 
 #ifdef CONFIG_POSIX
 /**
diff --git a/iohandler.c b/iohandler.c
index d361cf2c03..826f713e9f 100644
--- a/iohandler.c
+++ b/iohandler.c
@@ -45,10 +45,10 @@ typedef struct IOHandlerRecord {
 static QLIST_HEAD(, IOHandlerRecord) io_handlers =
     QLIST_HEAD_INITIALIZER(io_handlers);
 
-int qemu_set_fd_handler(int fd,
-                        IOHandler *fd_read,
-                        IOHandler *fd_write,
-                        void *opaque)
+void qemu_set_fd_handler(int fd,
+                         IOHandler *fd_read,
+                         IOHandler *fd_write,
+                         void *opaque)
 {
     IOHandlerRecord *ioh;
 
@@ -77,7 +77,6 @@ int qemu_set_fd_handler(int fd,
         ioh->deleted = 0;
         qemu_notify_event();
     }
-    return 0;
 }
 
 void qemu_iohandler_fill(GArray *pollfds)
diff --git a/stubs/set-fd-handler.c b/stubs/set-fd-handler.c
index a895e623f8..a8481bc3c1 100644
--- a/stubs/set-fd-handler.c
+++ b/stubs/set-fd-handler.c
@@ -1,10 +1,10 @@
 #include "qemu-common.h"
 #include "qemu/main-loop.h"
 
-int qemu_set_fd_handler(int fd,
-                        IOHandler *fd_read,
-                        IOHandler *fd_write,
-                        void *opaque)
+void qemu_set_fd_handler(int fd,
+                         IOHandler *fd_read,
+                         IOHandler *fd_write,
+                         void *opaque)
 {
     abort();
 }