diff --git a/build/sdk.atree b/build/sdk.atree
index 3c92d083c..89761167b 100644
--- a/build/sdk.atree
+++ b/build/sdk.atree
@@ -74,7 +74,7 @@ sdk/files/ant_test_rules_r1.xml  platforms/${PLATFORM_NAME}/templates/android_te
 sdk/files/ant_rules_r2.xml       platforms/${PLATFORM_NAME}/ant/ant_rules_r2.xml
 sdk/files/ant_test_rules_r2.xml  platforms/${PLATFORM_NAME}/ant/ant_test_rules_r2.xml
 sdk/files/ant_lib_rules_r2.xml   platforms/${PLATFORM_NAME}/ant/ant_lib_rules_r2.xml
-# layout device definitiion
+# layout device definition
 sdk/files/devices.xml            tools/lib/devices.xml
 
 # emacs support from sdk.git