diff --git a/src/Makefile.am b/src/Makefile.am
index d27fb3a3..ba222c2a 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -350,7 +350,7 @@ if XKB
 USE_XKB_LIBS = $(XKB_LIBS)
 endif
 
-libX11_la_LDFLAGS = -version-number 6:2:1 -no-undefined
+libX11_la_LDFLAGS = -version-number 6:2:0 -no-undefined
 
 libX11_la_LIBADD = \
 	$(USE_I18N_LIBS) \