diff --git a/makefile b/makefile
index b045e71..33cd10e 100644
--- a/makefile
+++ b/makefile
@@ -62,6 +62,7 @@
 include target/rules.mk
 include kernel/rules.mk
 include dev/rules.mk
+include app/rules.mk
 
 # recursively include any modules in the MODULE variable, leaving a trail of included
 # modules in the ALLMODULES list