diff --git a/aclocal-fallback/qt.m4 b/aclocal-fallback/qt.m4
new file mode 100644
index 0000000000..c82dc3fed0
--- /dev/null
+++ b/aclocal-fallback/qt.m4
@@ -0,0 +1,56 @@
+# Based on gtk-2.0.m4.
+# $Id$
+
+dnl AM_PATH_QT([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
+dnl Test for Qt+
+dnl Should also define QT_CFLAGS and QT_LIBS but not done yet...
+dnl
+AC_DEFUN([AM_PATH_QT],
+[
+
+  pkg_config_args=Qt
+
+  no_qt=""
+
+  AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
+
+  if test x$PKG_CONFIG != xno ; then
+    if pkg-config --atleast-pkgconfig-version 0.7 ; then
+      :
+    else
+      echo *** pkg-config too old; version 0.7 or better required.
+      no_qt=yes
+      PKG_CONFIG=no
+    fi
+  else
+    no_qt=yes
+  fi
+
+  min_qt_version=ifelse([$1], ,4.0.0,$1)
+  AC_MSG_CHECKING(for Qt - version >= $min_qt_version)
+
+  if test x"$no_qt" = x ; then
+    QT_CFLAGS=`$PKG_CONFIG --cflags $pkg_config_args`
+    QT_LIBS=`$PKG_CONFIG --libs $pkg_config_args`
+    qt_config_major_version=`$PKG_CONFIG --modversion $pkg_config_args | \
+           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
+    qt_config_minor_version=`$PKG_CONFIG --modversion $pkg_config_args | \
+           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
+    qt_config_micro_version=`$PKG_CONFIG --modversion $pkg_config_args | \
+           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
+
+    if $PKG_CONFIG --atleast-version $min_qt_version $pkg_config_args; then
+	  :
+    else
+	  no_qt=yes
+    fi
+  fi
+
+  if test x"$no_qt" = x ; then
+    AC_MSG_RESULT(yes (version $qt_config_major_version.$qt_config_minor_version.$qt_config_micro_version))
+     ifelse([$2], , :, [$2])
+  else
+     ifelse([$3], , :, [$3])
+  fi
+
+])
diff --git a/configure.ac b/configure.ac
index 7f02551996..86e3662417 100644
--- a/configure.ac
+++ b/configure.ac
@@ -907,10 +907,10 @@ GTK2_MIN_VERSION=2.12.0
 AC_SUBST(GTK2_MIN_VERSION)
 GTK3_MIN_VERSION=3.0.0
 AC_SUBST(GTK3_MIN_VERSION)
+QT_MIN_VERSION=4.6.0
+AC_SUBST(QT_MIN_VERSION)
 # GTK+ and Qt checks; we require GTK+ $GTK2_MIN_VERSION or later or
-# GTK3_MIN_VERSION or later, and, for now, don't require any particular
-# version of Qt (except perhaps by implication, as older versions might not
-# support pkgconfig).
+# GTK3_MIN_VERSION or later or Qt $QT_MIN_VERSION or later.
 #
 # We only do those if we're going to be building Wireshark;
 # otherwise, we don't have any GUI to build, so we don't use
@@ -974,6 +974,10 @@ if test "x$enable_wireshark" = "xyes"; then
 		],
 		AC_MSG_NOTICE([QtPrintSupport not found. Assuming Qt4]))
 
+		# Check for the minimum Qt version
+		# XXX the above checks should be moved into AM_PATH_QT.
+		AM_PATH_QT($QT_MIN_VERSION, , [AC_MSG_ERROR([Qt is not available])])
+
 		#
 		# We don't know whether we have GTK+, but we
 		# won't be using it, so it's as if we don't