diff --git a/install/install.py b/install/install.py
index 649310a..f14b8e9 100755
--- a/install/install.py
+++ b/install/install.py
@@ -302,7 +302,8 @@ def install_database(venv):
         # J'ai simplifié comme ça :
         '''
         sql_query += \
-            "GRANT ALL ON "+SQL_DATABASE_TEST+".* TO '"+SQL_USER+"'@'localhost' IDENTIFIED BY '"+SQL_PSWD+"' ;"
+            "GRANT ALL ON "+SQL_DATABASE_TEST+".* TO '"+SQL_USER+"'@'localhost' IDENTIFIED BY '"+SQL_PSWD+"' ; " +\
+            "GRANT USAGE ON *.* TO '"+SQL_USER+"'@localhost ; "
         # NEWER MYSQL:
         # OLDER MYSQL: Try this instead for OLDER mysql (works on CentOS 6.4 and Centos 7.5 with mysql 5.5):
         #req = "drop database pyros; CREATE DATABASE pyros; drop database pyros_test ; CREATE DATABASE pyros_test; drop user 'pyros'@'localhost' ; CREATE USER pyros; GRANT USAGE ON *.* TO 'pyros'; DROP USER 'pyros'; GRANT ALL ON pyros.* TO 'pyros'@'localhost' IDENTIFIED BY 'DjangoPyros'; GRANT ALL ON test_pyros.* TO 'pyros'@'localhost'; GRANT ALL PRIVILEGES ON test_pyros_test.* TO 'pyros'@'localhost'; GRANT ALL ON pyros_test.* TO 'pyros'@'localhost' IDENTIFIED BY 'DjangoPyros'"
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