diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c
index 75f6b90..bceeeb0 100644
--- a/ui/gtk-egl.c
+++ b/ui/gtk-egl.c
@@ -99,7 +99,7 @@
 #ifdef CONFIG_GBM
         if (dmabuf) {
             egl_dmabuf_create_fence(dmabuf);
-            if (dmabuf->fence_fd > 0) {
+            if (dmabuf->fence_fd >= 0) {
                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
                 return;
             }
diff --git a/ui/gtk-gl-area.c b/ui/gtk-gl-area.c
index 4fff957..b490727 100644
--- a/ui/gtk-gl-area.c
+++ b/ui/gtk-gl-area.c
@@ -86,7 +86,7 @@
 #ifdef CONFIG_GBM
         if (dmabuf) {
             egl_dmabuf_create_fence(dmabuf);
-            if (dmabuf->fence_fd > 0) {
+            if (dmabuf->fence_fd >= 0) {
                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
                 return;
             }
diff --git a/ui/gtk.c b/ui/gtk.c
index 810d7fc..7819a86 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -597,10 +597,12 @@
     VirtualConsole *vc = vcon;
     QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
 
-    qemu_set_fd_handler(dmabuf->fence_fd, NULL, NULL, NULL);
-    close(dmabuf->fence_fd);
-    dmabuf->fence_fd = -1;
-    graphic_hw_gl_block(vc->gfx.dcl.con, false);
+    if (dmabuf->fence_fd >= 0) {
+        qemu_set_fd_handler(dmabuf->fence_fd, NULL, NULL, NULL);
+        close(dmabuf->fence_fd);
+        dmabuf->fence_fd = -1;
+        graphic_hw_gl_block(vc->gfx.dcl.con, false);
+    }
 }
 
 /** DisplayState Callbacks (opengl version) **/