diff --git a/data/Locations.xml b/data/Locations.xml
index 85533ec..92170d8 100644
--- a/data/Locations.xml
+++ b/data/Locations.xml
@@ -1042,7 +1042,7 @@
       <iso-code>MA</iso-code>
       <fips-code>MO</fips-code>
       <timezones>
-        <timezone id="Africa/Casablanca" value="0.0" />
+        <timezone id="Africa/Casablanca" value="1.0" />
       </timezones>
       <tz-hint>Africa/Casablanca</tz-hint>
       <location>