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diff --git a/src/Makefile.am b/src/Makefile.am
index d46b493..ddad93c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -364,7 +364,11 @@ if XKB
 USE_XKB_LIBS = $(XKB_LIBS)
 endif
 
-libX11_la_LDFLAGS = -version-number 6:3:0 -no-undefined
+libX11_la_LDFLAGS = -version-number 4 -no-undefined \
+	$(ADD_libX11_LDFLAGS) \
+	-M $(top_srcdir)/../mapfile-vers \
+	-M $(top_srcdir)/../mapfile-order \
+	-N libXext.so.0
 
 libX11_la_LIBADD = \
 	$(USE_I18N_LIBS) \