diff --git a/common/configure.ac b/common/configure.ac
index a9fe241..25aa5f0 100644
--- a/common/configure.ac
+++ b/common/configure.ac
@@ -78,7 +78,7 @@
 AM_CONDITIONAL([INCLUDED_JPEG], [ test "x$INCLUDED_JPEG" = xyes ])
 AC_CONFIG_SUBDIRS([jpeg])
 
-AC_CHECK_FUNCS_ONCE([vsnprintf strcasecmp strncasecmp getaddrinfo])
+AC_CHECK_FUNCS_ONCE([vsnprintf snprintf strcasecmp strncasecmp getaddrinfo])
 
 AC_CHECK_TYPES([socklen_t],
 	[AC_DEFINE([VNC_SOCKLEN_T], [socklen_t], [Use correct size])],