diff --git a/dinocpu/Makefile b/dinocpu/Makefile
index 2a626b0..3267b49 100644
--- a/dinocpu/Makefile
+++ b/dinocpu/Makefile
@@ -10,13 +10,13 @@ $(fir_filename): $(generated_dir)/$(fir_filename)
 
 
 Top.h: $(fir_filename)
-	cd ../essent; sbt 'run -O2 $(fir_path)'; cd ../dinocpu; rm Top.fir;
+	cd ../essent; sbt 'run -O2 $(fir_path)'
 
 
 CXXFLAGS = -O3 -std=c++11 -g
 INCLUDES = -I../firrtl-sig 
 
-top: top.cc
+top: top.cc Top.h
 	$(CXX) $(CXXFLAGS) $(INCLUDES) top.cc -o top 
 clean:
 	rm Top.h top Top.fir
diff --git a/dinocpu/README.md b/dinocpu/README.md
index 6c6b45d..3506342 100644
--- a/dinocpu/README.md
+++ b/dinocpu/README.md
@@ -2,7 +2,7 @@
 
 ### run `make top` to create header file
 ### modify `cpu$registers$io_writereg` to be a global variable
-## run `make`
+## run `make top`
 
 # Usage: