diff --git a/ui/vnc-enc-tight.c b/ui/vnc-enc-tight.c
index 6d36a7f7ae..5c02803411 100644
--- a/ui/vnc-enc-tight.c
+++ b/ui/vnc-enc-tight.c
@@ -34,6 +34,9 @@
 #include "qemu-common.h"
 
 #ifdef CONFIG_VNC_PNG
+/* The following define is needed by pngconf.h. Otherwise it won't compile,
+   because setjmp.h was already included by qemu-common.h. */
+#define PNG_SKIP_SETJMP_CHECK
 #include <png.h>
 #endif
 #ifdef CONFIG_VNC_JPEG