diff --git a/tiva/.dir-locals.el b/tiva/.dir-locals.el
index b9d30ef..5ddedcf 100644
--- a/tiva/.dir-locals.el
+++ b/tiva/.dir-locals.el
@@ -1 +1,3 @@
-((zig-mode . ((ff-search-directories . ("/home/priec/programs/CMSIS/CMSIS/Include" "/home/priec/programs/CMSIS/Device/TI/TM4C/Include")))))
+((zig-mode . ((ffap-c-path . ("/home/priec/programs/CMSIS/CMSIS/Include"
+                              "/home/priec/programs/CMSIS/Device/TI/TM4C/Include"
+                              "/usr/include")))))