diff --git a/mingw-glib2.spec b/mingw-glib2.spec
index 2a09122..dd93dc2 100644
--- a/mingw-glib2.spec
+++ b/mingw-glib2.spec
@@ -35,6 +35,9 @@ BuildRequires:  gettext
 # Native version required for glib-genmarshal
 BuildRequires:  glib2-devel >= 2.31.20
 
+# Needed for patch2
+BuildRequires:  autoconf automake libtool
+
 # https://bugzilla.gnome.org/show_bug.cgi?id=675516
 Patch0:         0001-Don-t-start-a-DBus-server-when-built-as-static-lib.patch
 
@@ -88,6 +91,8 @@ Static version of the MinGW Windows GLib2 library.
 %patch1 -p1
 %patch2 -p1
 
+autoreconf -i --force
+
 
 %build
 #GLib can't build static and shared libraries in one go, so we build GLib twice