diff --git a/basis/compiler/cfg/linear-scan/allocation/splitting/splitting-docs.factor b/basis/compiler/cfg/linear-scan/allocation/splitting/splitting-docs.factor
new file mode 100644
index 0000000000..4436f85dc7
--- /dev/null
+++ b/basis/compiler/cfg/linear-scan/allocation/splitting/splitting-docs.factor
@@ -0,0 +1,16 @@
+USING: compiler.cfg.linear-scan.live-intervals help.markup help.syntax
+math ;
+IN: compiler.cfg.linear-scan.allocation.splitting
+
+HELP: split-interval
+{ $values
+  { "live-interval" live-interval-state }
+  { "n" integer }
+  { "before" live-interval-state }
+  { "after" live-interval-state }
+} { $description "Splits the interval in two around the flow point 'n'." } ;
+
+ARTICLE: "compiler.cfg.linear-scan.allocation.splitting" "Live interval splitting"
+"This vocab splits live intervals." ;
+
+ABOUT: "compiler.cfg.linear-scan.allocation.splitting"