--- a/libcanberra-gtk.pc.in
+++ b/libcanberra-gtk.pc.in
@@ -6,6 +6,7 @@ includedir=@includedir@
 Name: libcanberra-gtk
 Description: Gtk Event Sound API
 Version: @PACKAGE_VERSION@
-Libs: -L${libdir} -lcanberra-gtk -lX11 @PTHREAD_LIBS@
+Libs: -L${libdir} -lcanberra-gtk @PTHREAD_LIBS@
 Cflags: -D_REENTRANT -I${includedir}
 Requires: libcanberra gdk-2.0 gtk+-2.0
+Requires.private: x11
--- a/libcanberra-gtk3.pc.in
+++ b/libcanberra-gtk3.pc.in
@@ -6,6 +6,7 @@ includedir=@includedir@
 Name: libcanberra-gtk3
 Description: Gtk3 Event Sound API
 Version: @PACKAGE_VERSION@
-Libs: -L${libdir} -lcanberra-gtk3 -lX11 @PTHREAD_LIBS@
+Libs: -L${libdir} -lcanberra-gtk3 @PTHREAD_LIBS@
 Cflags: -D_REENTRANT -I${includedir}
 Requires: libcanberra gdk-3.0 gtk+-3.0
+Requires.private: x11