diff --git a/Makefile b/Makefile
index e531272..26084f3 100644
--- a/Makefile
+++ b/Makefile
@@ -17,7 +17,7 @@ CC=cc
 RUSTC=rustc
 
 .PHONY: all
-all: dj false fop intcmp scrut str strcmp true
+all: dj false fop intcmp rpn scrut str strcmp true
 
 build:
 	# keep build/include until bindgen(1) has stdin support