diff --git a/src/DataTypes/ya.make b/src/DataTypes/ya.make
index 7d507a2f611..82e9baf76f2 100644
--- a/src/DataTypes/ya.make
+++ b/src/DataTypes/ya.make
@@ -1,3 +1,4 @@
+# This file is generated automatically, do not edit. See 'ya.make.in' and use 'utils/generate-ya-make' to regenerate it.
 LIBRARY()
 
 PEERDIR(
diff --git a/src/Dictionaries/ya.make b/src/Dictionaries/ya.make
index e30a22a372c..12983b9527a 100644
--- a/src/Dictionaries/ya.make
+++ b/src/Dictionaries/ya.make
@@ -1,3 +1,4 @@
+# This file is generated automatically, do not edit. See 'ya.make.in' and use 'utils/generate-ya-make' to regenerate it.
 LIBRARY()
 
 PEERDIR(
diff --git a/src/Functions/ya.make b/src/Functions/ya.make
index bbbf13d360b..70c42dd5af7 100644
--- a/src/Functions/ya.make
+++ b/src/Functions/ya.make
@@ -1,3 +1,4 @@
+# This file is generated automatically, do not edit. See 'ya.make.in' and use 'utils/generate-ya-make' to regenerate it.
 LIBRARY()
 
 CFLAGS(
diff --git a/utils/generate-ya-make/generate-ya-make.sh b/utils/generate-ya-make/generate-ya-make.sh
index ec4511f56c1..84be2177386 100755
--- a/utils/generate-ya-make/generate-ya-make.sh
+++ b/utils/generate-ya-make/generate-ya-make.sh
@@ -8,5 +8,6 @@ ROOT_PATH=$(git rev-parse --show-toplevel)
 EXCLUDE_DIRS='build/|integration/|widechar_width/|glibc-compatibility/|memcpy/|consistent-hashing'
 
 find "${ROOT_PATH}" -name 'ya.make.in' | while read path; do
-    (cd $(dirname "${path}") && perl -pne 's/<\?(.+?)\?>/`$1`/e' < "${path}" > "${path/.in/}")
+    echo "# This file is generated automatically, do not edit. See 'ya.make.in' and use 'utils/generate-ya-make' to regenerate it." > "${path/.in/}"
+    (cd $(dirname "${path}") && perl -pne 's/<\?(.+?)\?>/`$1`/e' < "${path}" >> "${path/.in/}")
 done