diff -ur audacious-plugins-2.1.orig/configure.ac audacious-plugins-2.1/configure.ac
--- audacious-plugins-2.1.orig/configure.ac	2009-07-07 01:40:35.000000000 +0300
+++ audacious-plugins-2.1/configure.ac	2009-07-26 18:54:48.000000000 +0300
@@ -747,7 +747,7 @@
 
 if test "x$enable_musepack" = "xyes"; then
     PKG_CHECK_MODULES(TAGLIB, [taglib >= 1.4], [ 
-       AC_CHECK_HEADERS(mpcdec/config_types.h,, [
+       AC_CHECK_HEADERS(mpcdecsv7/config_types.h,, [
            enable_musepack=no
        ])
     ], [enable_musepack=no])
diff -ur audacious-plugins-2.1.orig/src/musepack/libmpc.h audacious-plugins-2.1/src/musepack/libmpc.h
--- audacious-plugins-2.1.orig/src/musepack/libmpc.h	2009-07-07 01:40:36.000000000 +0300
+++ audacious-plugins-2.1/src/musepack/libmpc.h	2009-07-26 18:55:09.000000000 +0300
@@ -21,7 +21,7 @@
 //libmpcdec headers
 #undef TRUE
 #undef FALSE
-#include <mpcdec/mpcdec.h>
+#include <mpcdecsv7/mpcdec.h>
 
 //GTK+ headers
 #include <glib.h>
diff -ur audacious-plugins-2.1.orig/src/musepack/Makefile audacious-plugins-2.1/src/musepack/Makefile
--- audacious-plugins-2.1.orig/src/musepack/Makefile	2009-07-07 01:40:36.000000000 +0300
+++ audacious-plugins-2.1/src/musepack/Makefile	2009-07-26 18:55:21.000000000 +0300
@@ -9,4 +9,4 @@
 
 CXXFLAGS += ${PLUGIN_CFLAGS}
 CPPFLAGS += ${PLUGIN_CPPFLAGS} ${MOWGLI_CFLAGS}  ${GTK_CFLAGS} ${GLIB_CFLAGS}  ${TAGLIB_CFLAGS} -I../..
-LIBS += ${TAGLIB_LIBS} ${GTK_LIBS} ${GLIB_LIBS}  ${MOWGLI_LIBS} -lmpcdec
+LIBS += ${TAGLIB_LIBS} ${GTK_LIBS} ${GLIB_LIBS}  ${MOWGLI_LIBS} -lmpcdecsv7