--- spice-gtk-0.7/configure.ac.orig	2011-07-18 20:28:07.000000000 +0200
+++ spice-gtk-0.7/configure.ac	2011-07-21 18:49:42.148016898 +0200
@@ -70,18 +70,18 @@
 PKG_CHECK_MODULES(PIXMAN, pixman-1 >= 0.17.7)
 AC_SUBST(PIXMAN_CFLAGS)
 AC_SUBST(PIXMAN_LIBS)
-SPICE_GLIB_REQUIRES+=" pixman-1 >= 0.17.7"
+SPICE_GLIB_REQUIRES="$SPICE_GLIB_REQUIRES pixman-1 >= 0.17.7"
 
 PKG_CHECK_MODULES(CELT051, celt051 >= 0.5.1.1)
 AC_SUBST(CELT051_CFLAGS)
 AC_SUBST(CELT051_LIBS)
 AC_SUBST(CELT051_LIBDIR)
-SPICE_GLIB_REQUIRES+=" celt051 >= 0.5.1.1"
+SPICE_GLIB_REQUIRES="$SPICE_GLIB_REQUIRES celt051 >= 0.5.1.1"
 
 PKG_CHECK_MODULES(SSL, openssl)
 AC_SUBST(SSL_CFLAGS)
 AC_SUBST(SSL_LIBS)
-SPICE_GLIB_REQUIRES+=" openssl"
+SPICE_GLIB_REQUIRES="$SPICE_GLIB_REQUIRES openssl"
 
 dnl Cyrus SASL
 AC_ARG_WITH([sasl],
@@ -164,7 +164,7 @@
 PKG_CHECK_MODULES(GTK, gtk+-$GTK_API_VERSION >= $GTK_REQUIRED)
 AC_SUBST(GTK_CFLAGS)
 AC_SUBST(GTK_LIBS)
-SPICE_GTK_REQUIRES+=" gtk+-$GTK_API_VERSION >= $GTK_REQUIRED"
+SPICE_GTK_REQUIRES="$SPICE_GTK_REQUIRES gtk+-$GTK_API_VERSION >= $GTK_REQUIRED"
 
 PKG_CHECK_EXISTS([gtk+-x11-$with_gtk], [have_x11=yes], [have_x11=no])
 AS_IF([test "x$have_x11" = "xyes"], [AC_DEFINE([HAVE_X11], 1, [Have x11?])])