diff --git a/x11-wm/xfce4-session/files/patch-libxfsm-Makefile.in b/x11-wm/xfce4-session/files/patch-libxfsm-Makefile.in
new file mode 100644
index 000000000000..7d59e56e74a8
--- /dev/null
+++ b/x11-wm/xfce4-session/files/patch-libxfsm-Makefile.in
@@ -0,0 +1,11 @@
+--- libxfsm/Makefile.in.orig	Sun May 15 21:16:14 2005
++++ libxfsm/Makefile.in	Wed Jun  1 19:13:37 2005
+@@ -272,7 +272,7 @@
+ 	xfsm-splash-engine.h						\
+ 	xfsm-splash-rc.h
+ 
+-pkgconfigdir = $(libdir)/pkgconfig
++pkgconfigdir = $(prefix)/libdata/pkgconfig
+ pkgconfig_DATA = xfce4-session-1.0.pc
+ all: all-am
+ 
diff --git a/x11-wm/xfce4-session/pkg-plist b/x11-wm/xfce4-session/pkg-plist
index 2a5eb1d4b1b1..70273f4f25aa 100644
--- a/x11-wm/xfce4-session/pkg-plist
+++ b/x11-wm/xfce4-session/pkg-plist
@@ -6,7 +6,7 @@ include/xfce4/xfce4-session-4.2/libxfsm/xfsm-splash-rc.h
 lib/libxfsm-4.2.a
 lib/libxfsm-4.2.so
 lib/libxfsm-4.2.so.0
-lib/pkgconfig/xfce4-session-1.0.pc
+libdata/pkgconfig/xfce4-session-1.0.pc
 lib/xfce4/mcs-plugins/session_settings.so
 lib/xfce4/mcs-plugins/splash_settings.so
 lib/xfce4/splash/engines/libbalou.so