diff --git a/README.md b/README.md
index 0e15e32..d6d472a 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,7 @@ git clone https://github.com/<account>/<app>_ynh
  * warn missing sudo before commands
  * make sure verifications are done before modifications on the system
  * check non usage of helpers and propose them
+ - check 'set -eu' usage
 
 ## License
 
diff --git a/package_linter.py b/package_linter.py
index f6cc8ba..2c770d7 100755
--- a/package_linter.py
+++ b/package_linter.py
@@ -171,6 +171,7 @@ def check_script(path, script_name, script_nbr):
     return_code = check_non_helpers_usage(script) or return_code
     if script_nbr < 5:
         return_code = check_verifications_done_before_modifying_system(script) or return_code
+        return_code = check_set_usage(script_name, script) or return_code
 
     return return_code
 
@@ -268,6 +269,24 @@ def check_non_helpers_usage(script):
 
     return return_code
 
+
+def check_set_usage(script_name, script):
+    return_code = 0
+    present = False
+    set_val = "set -u" if script_name == "remove" else "set -eu"
+
+    for line in script:
+        if set_val in line:
+            present = True
+            break
+    if present:
+        print_right(set_val + " is present")
+    else:
+        print_wrong(set_val + " is missing. For details, look at https://dev.yunohost.org/issues/419")
+        return_code = 1
+
+    return return_code
+
 if __name__ == '__main__':
     os.system("clear")