diff --git a/alliance/src/documentation/tutorials/place_and_route/src/Makefile b/alliance/src/documentation/tutorials/place_and_route/src/Makefile
index a0c10e2a..7807578c 100644
--- a/alliance/src/documentation/tutorials/place_and_route/src/Makefile
+++ b/alliance/src/documentation/tutorials/place_and_route/src/Makefile
@@ -1,4 +1,4 @@
-ALL_DIRS = amd2901 inversor buffer
+ALL_DIRS = amd2901 inv buffer
 
 all :
 	@for FILE in $(ALL_DIRS)                ;\