diff --git a/makefile b/makefile
index ee85ce2..f416acd 100644
--- a/makefile
+++ b/makefile
@@ -1,7 +1,7 @@
 all: build
 
 help:
-	@echo "usage: make [build|install|serve-doc]"
+	@echo "usage: make [build|install|doc|serve-doc]"
 
 ZIGOPTIM ?= ReleaseSafe
 build:
@@ -29,6 +29,9 @@ uninstall: uninstall-library uninstall-header
 mrproper:
 	rm -r docs zig-cache zig-out 2>/dev/null || true
 
+doc:
+	zig build-lib -femit-docs src/main.zig
+
 DOC_HTTPD_ACCESS_LOGS ?= /tmp/access.log
 DOC_HTTPD_ADDR        ?= 127.0.0.1
 DOC_HTTPD_PORT        ?= 35000