diff --git a/mk/docs.mk b/mk/docs.mk
index 6fdf50b1801..ee9f4b69d9a 100644
--- a/mk/docs.mk
+++ b/mk/docs.mk
@@ -4,7 +4,7 @@
 
 doc/version.texi: $(MKFILES) rust.texi
 	echo "@macro gitversion" >$@
-	echo $(CFG_VERSION) >>$@
+	echo "$(CFG_VERSION)" >>$@
 	echo "@end macro" >>$@
 
 doc/%.pdf: %.texi doc/version.texi