diff --git a/dev/bootstrap.sh b/dev/bootstrap.sh
index c479bce..0b90982 100755
--- a/dev/bootstrap.sh
+++ b/dev/bootstrap.sh
@@ -1,8 +1,14 @@
 #!/usr/bin/env bash
 
-## dev pre-processor bootstrap rev 2016121101
+## dev pre-processor bootstrap rev 2016121301
 ## Yeah !!! A really tech sounding name... In fact it's just include emulation in bash
 
+EXEC_PATH="$(cd "$(dirname "$1")"; pwd)/$(basename "$1")"
+if [ "$(basename $EXEC_PATH)" != "dev" ]; then
+	echo "Plrase run bootstrap.sh from osync/dev directory."
+	exit 1
+fi
+
 outputFileName="$0"
 
 source "merge.sh"