diff --git a/GNUmakefile b/GNUmakefile
index da0fd22..0086c7b 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -7,9 +7,12 @@ DIST?=	dist/
 GO?=	go
 
 #
-all: dist/ir-tfidf
+all: dist/ir-bm25 dist/ir-tfidf
 	@true
 
+dist/ir-bm25: cmd/ir-bm25/*
+	"${GO}" build -o "${DIST}" ./cmd/ir-bm25
+
 dist/ir-tfidf: cmd/ir-tfidf/*
 	"${GO}" build -o "${DIST}" ./cmd/ir-tfidf
 
diff --git a/cmd/ir-bm25/main.go b/cmd/ir-bm25/main.go
new file mode 100644
index 0000000..da29a2c
--- /dev/null
+++ b/cmd/ir-bm25/main.go
@@ -0,0 +1,4 @@
+package main
+
+func main() {
+}